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db4dec29-c984-4fee-906d-37fecea605cc
robust-unsupervised-graph-representation
2201.08557
null
https://arxiv.org/abs/2201.08557v2
https://arxiv.org/pdf/2201.08557v2.pdf
Toward Enhanced Robustness in Unsupervised Graph Representation Learning: A Graph Information Bottleneck Perspective
Recent studies have revealed that GNNs are vulnerable to adversarial attacks. Most existing robust graph learning methods measure model robustness based on label information, rendering them infeasible when label information is not available. A straightforward direction is to employ the widely used Infomax technique from typical Unsupervised Graph Representation Learning (UGRL) to learn robust unsupervised representations. Nonetheless, directly transplanting the Infomax technique from typical UGRL to robust UGRL may involve a biased assumption. In light of the limitation of Infomax, we propose a novel unbiased robust UGRL method called Robust Graph Information Bottleneck (RGIB), which is grounded in the Information Bottleneck (IB) principle. Our RGIB attempts to learn robust node representations against adversarial perturbations by preserving the original information in the benign graph while eliminating the adversarial information in the adversarial graph. There are mainly two challenges to optimize RGIB: 1) high complexity of adversarial attack to perturb node features and graph structure jointly in the training procedure; 2) mutual information estimation upon adversarially attacked graphs. To tackle these problems, we further propose an efficient adversarial training strategy with only feature perturbations and an effective mutual information estimator with subgraph-level summary. Moreover, we theoretically establish a connection between our proposed RGIB and the robustness of downstream classifiers, revealing that RGIB can provide a lower bound on the adversarial risk of downstream classifiers. Extensive experiments over several benchmarks and downstream tasks demonstrate the effectiveness and superiority of our proposed method.
['Qinghua Zheng', 'Jun Zhou', 'Ziqi Liu', 'Jundong Li', 'Minnan Luo', 'Jihong Wang']
2022-01-21
null
null
null
null
['mutual-information-estimation']
['methodology']
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[6.1593146324157715, 7.290466785430908]
a5b0c5e2-4883-4f8b-a191-4b88e32fc89d
how-to-train-good-word-embeddings-for
null
null
https://aclanthology.org/W16-2922
https://aclanthology.org/W16-2922.pdf
How to Train good Word Embeddings for Biomedical NLP
null
['Gamal Crichton', 'Billy Chiu', 'Anna Korhonen', 'Sampo Pyysalo']
2016-08-01
null
null
null
ws-2016-8
['learning-word-embeddings']
['methodology']
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[-7.43160343170166, 3.6355607509613037]
a09e669e-44b7-40ec-b23b-54d7d34ae860
feature-reduction-for-machine-learning-on
2101.05546
null
https://arxiv.org/abs/2101.05546v1
https://arxiv.org/pdf/2101.05546v1.pdf
Feature reduction for machine learning on molecular features: The GeneScore
We present the GeneScore, a concept of feature reduction for Machine Learning analysis of biomedical data. Using expert knowledge, the GeneScore integrates different molecular data types into a single score. We show that the GeneScore is superior to a binary matrix in the classification of cancer entities from SNV, Indel, CNV, gene fusion and gene expression data. The GeneScore is a straightforward way to facilitate state-of-the-art analysis, while making use of the available scientific knowledge on the nature of molecular data features used.
['Sylvia Nürnberg', 'Frank Ueckert', 'Theresa Grooss', 'Anastasia Steshina', 'Alexander Denker']
2021-01-14
null
null
null
null
['art-analysis']
['computer-vision']
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[6.228966236114502, 5.629906177520752]
2c43d9ca-282e-4305-9d93-3ac27b8115b7
top-down-beats-bottom-up-in-3d-instance
2302.02871
null
https://arxiv.org/abs/2302.02871v3
https://arxiv.org/pdf/2302.02871v3.pdf
Top-Down Beats Bottom-Up in 3D Instance Segmentation
Most 3D instance segmentation methods exploit a bottom-up strategy, typically including resource-exhaustive post-processing. For point grouping, bottom-up methods rely on prior assumptions about the objects in the form of hyperparameters, which are domain-specific and need to be carefully tuned. On the contrary, we address 3D instance segmentation with a TD3D: top-down, fully data-driven, simple approach trained in an end-to-end manner. With its straightforward fully-convolutional pipeline, it performs surprisingly well on the standard benchmarks: ScanNet v2, its extension ScanNet200, and S3DIS. Besides, our method is much faster on inference than the current state-of-the-art grouping-based approaches. Code is available at https://github.com/SamsungLabs/td3d .
['Anton Konushin', 'Anna Vorontsova', 'Danila Rukhovich', 'Maksim Kolodiazhnyi']
2023-02-06
null
null
null
null
['3d-instance-segmentation-1']
['computer-vision']
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[8.093801498413086, -3.096825122833252]
7b4ca608-345d-4a31-a086-91de41744b88
stochastic-talking-face-generation-using
2011.10727
null
https://arxiv.org/abs/2011.10727v1
https://arxiv.org/pdf/2011.10727v1.pdf
Stochastic Talking Face Generation Using Latent Distribution Matching
The ability to envisage the visual of a talking face based just on hearing a voice is a unique human capability. There have been a number of works that have solved for this ability recently. We differ from these approaches by enabling a variety of talking face generations based on single audio input. Indeed, just having the ability to generate a single talking face would make a system almost robotic in nature. In contrast, our unsupervised stochastic audio-to-video generation model allows for diverse generations from a single audio input. Particularly, we present an unsupervised stochastic audio-to-video generation model that can capture multiple modes of the video distribution. We ensure that all the diverse generations are plausible. We do so through a principled multi-modal variational autoencoder framework. We demonstrate its efficacy on the challenging LRW and GRID datasets and demonstrate performance better than the baseline, while having the ability to generate multiple diverse lip synchronized videos.
['Rajesh M Hegde', 'Vinay P Namboodiri', 'Ashish Sardana', 'Ravindra Yadav']
2020-11-21
null
null
null
null
['talking-face-generation']
['computer-vision']
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[13.154438972473145, -0.38568711280822754]
af169a1e-8880-449f-a257-aa0ae08f9b19
on-the-susceptibility-and-robustness-of-time
2301.03703
null
https://arxiv.org/abs/2301.03703v1
https://arxiv.org/pdf/2301.03703v1.pdf
On the Susceptibility and Robustness of Time Series Models through Adversarial Attack and Defense
Under adversarial attacks, time series regression and classification are vulnerable. Adversarial defense, on the other hand, can make the models more resilient. It is important to evaluate how vulnerable different time series models are to attacks and how well they recover using defense. The sensitivity to various attacks and the robustness using the defense of several time series models are investigated in this study. Experiments are run on seven-time series models with three adversarial attacks and one adversarial defense. According to the findings, all models, particularly GRU and RNN, appear to be vulnerable. LSTM and GRU also have better defense recovery. FGSM exceeds the competitors in terms of attacks. PGD attacks are more difficult to recover from than other sorts of attacks.
['Bidhan Bashyal', 'Asadullah Hill Galib']
2023-01-09
null
null
null
null
['adversarial-defense', 'time-series-regression']
['adversarial', 'time-series']
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[5.652348041534424, 7.742506504058838]
a48cfd94-e1e8-4271-afdd-c7ac7803721a
alpcah-sample-wise-heteroscedastic-pca-with
2307.02745
null
https://arxiv.org/abs/2307.02745v1
https://arxiv.org/pdf/2307.02745v1.pdf
ALPCAH: Sample-wise Heteroscedastic PCA with Tail Singular Value Regularization
Principal component analysis (PCA) is a key tool in the field of data dimensionality reduction that is useful for various data science problems. However, many applications involve heterogeneous data that varies in quality due to noise characteristics associated with different sources of the data. Methods that deal with this mixed dataset are known as heteroscedastic methods. Current methods like HePPCAT make Gaussian assumptions of the basis coefficients that may not hold in practice. Other methods such as Weighted PCA (WPCA) assume the noise variances are known, which may be difficult to know in practice. This paper develops a PCA method that can estimate the sample-wise noise variances and use this information in the model to improve the estimate of the subspace basis associated with the low-rank structure of the data. This is done without distributional assumptions of the low-rank component and without assuming the noise variances are known. Simulations show the effectiveness of accounting for such heteroscedasticity in the data, the benefits of using such a method with all of the data versus retaining only good data, and comparisons are made against other PCA methods established in the literature like PCA, Robust PCA (RPCA), and HePPCAT. Code available at https://github.com/javiersc1/ALPCAH
['Laura Balzano', 'Jeffrey A. Fessler', 'Javier Salazar Cavazos']
2023-07-06
null
null
null
null
['dimensionality-reduction']
['methodology']
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[7.701168060302734, 4.22667121887207]
da517ede-0b10-41e4-a868-28026e7b25f4
food-recognition-and-recipe-analysis
1801.07239
null
http://arxiv.org/abs/1801.07239v1
http://arxiv.org/pdf/1801.07239v1.pdf
Food recognition and recipe analysis: integrating visual content, context and external knowledge
The central role of food in our individual and social life, combined with recent technological advances, has motivated a growing interest in applications that help to better monitor dietary habits as well as the exploration and retrieval of food-related information. We review how visual content, context and external knowledge can be integrated effectively into food-oriented applications, with special focus on recipe analysis and retrieval, food recommendation, and the restaurant context as emerging directions.
['Weiqing Min', 'Luis Herranz', 'Shuqiang Jiang']
2018-01-22
null
null
null
null
['food-recognition', 'food-recommendation']
['computer-vision', 'miscellaneous']
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[11.546428680419922, 4.478516101837158]
635be74a-6998-43ef-840c-03013f3c2ed1
low-resource-white-box-semantic-segmentation
2306.07809
null
https://arxiv.org/abs/2306.07809v1
https://arxiv.org/pdf/2306.07809v1.pdf
Low-Resource White-Box Semantic Segmentation of Supporting Towers on 3D Point Clouds via Signature Shape Identification
Research in 3D semantic segmentation has been increasing performance metrics, like the IoU, by scaling model complexity and computational resources, leaving behind researchers and practitioners that (1) cannot access the necessary resources and (2) do need transparency on the model decision mechanisms. In this paper, we propose SCENE-Net, a low-resource white-box model for 3D point cloud semantic segmentation. SCENE-Net identifies signature shapes on the point cloud via group equivariant non-expansive operators (GENEOs), providing intrinsic geometric interpretability. Our training time on a laptop is 85~min, and our inference time is 20~ms. SCENE-Net has 11 trainable geometrical parameters and requires fewer data than black-box models. SCENE--Net offers robustness to noisy labeling and data imbalance and has comparable IoU to state-of-the-art methods. With this paper, we release a 40~000 Km labeled dataset of rural terrain point clouds and our code implementation.
['Patrizio Frosini', 'Manuel Silva', 'Alex Coronati', 'Giovanni Bocchi', 'Alessandra Micheletti', 'Cláudia Soares', 'Diogo Lavado']
2023-06-13
null
null
null
null
['3d-semantic-segmentation']
['computer-vision']
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[7.964091777801514, -3.2657992839813232]
f566bc21-b6bf-44e7-9ee8-8c442451ead9
building-dynamic-knowledge-graphs-from-text-2
1910.09532
null
https://arxiv.org/abs/1910.09532v3
https://arxiv.org/pdf/1910.09532v3.pdf
Building Dynamic Knowledge Graphs from Text-based Games
We are interested in learning how to update Knowledge Graphs (KG) from text. In this preliminary work, we propose a novel Sequence-to-Sequence (Seq2Seq) architecture to generate elementary KG operations. Furthermore, we introduce a new dataset for KG extraction built upon text-based game transitions (over 300k data points). We conduct experiments and discuss the results.
['Marc-Alexandre Côté', 'Mikuláš Zelinka', 'Xingdi Yuan', 'Romain Laroche', 'Adam Trischler']
2019-10-21
null
null
null
null
['text-based-games']
['playing-games']
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[9.254733085632324, 8.096877098083496]
48aa36a5-7378-47df-9c29-301b6bebb945
dcmt-a-direct-entire-space-causal-multi-task
2302.06141
null
https://arxiv.org/abs/2302.06141v1
https://arxiv.org/pdf/2302.06141v1.pdf
DCMT: A Direct Entire-Space Causal Multi-Task Framework for Post-Click Conversion Estimation
In recommendation scenarios, there are two long-standing challenges, i.e., selection bias and data sparsity, which lead to a significant drop in prediction accuracy for both Click-Through Rate (CTR) and post-click Conversion Rate (CVR) tasks. To cope with these issues, existing works emphasize on leveraging Multi-Task Learning (MTL) frameworks (Category 1) or causal debiasing frameworks (Category 2) to incorporate more auxiliary data in the entire exposure/inference space D or debias the selection bias in the click/training space O. However, these two kinds of solutions cannot effectively address the not-missing-at-random problem and debias the selection bias in O to fit the inference in D. To fill the research gaps, we propose a Direct entire-space Causal Multi-Task framework, namely DCMT, for post-click conversion prediction in this paper. Specifically, inspired by users' decision process of conversion, we propose a new counterfactual mechanism to debias the selection bias in D, which can predict the factual CVR and the counterfactual CVR under the soft constraint of a counterfactual prior knowledge. Extensive experiments demonstrate that our DCMT can improve the state-of-the-art methods by an average of 1.07% in terms of CVR AUC on the five offline datasets and 0.75% in terms of PV-CVR on the online A/B test (the Alipay Search). Such improvements can increase millions of conversions per week in real industrial applications, e.g., the Alipay Search.
['Yan Wang', 'Guanfeng Liu', 'Fei Wu', 'Chaochao Chen', 'Jun Zhou', 'Tiehua Zhang', 'Lu Yu', 'Longfei Li', 'Xinxing Yang', 'Mingjie Zhong', 'Feng Zhu']
2023-02-13
null
null
null
null
['selection-bias']
['natural-language-processing']
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[9.727709770202637, 5.396203517913818]
439057d1-df74-4000-b0aa-98ebbd5a2fd7
mitosis-domain-generalization-in
2204.03742
null
https://arxiv.org/abs/2204.03742v1
https://arxiv.org/pdf/2204.03742v1.pdf
Mitosis domain generalization in histopathology images -- The MIDOG challenge
The density of mitotic figures within tumor tissue is known to be highly correlated with tumor proliferation and thus is an important marker in tumor grading. Recognition of mitotic figures by pathologists is known to be subject to a strong inter-rater bias, which limits the prognostic value. State-of-the-art deep learning methods can support the expert in this assessment but are known to strongly deteriorate when applied in a different clinical environment than was used for training. One decisive component in the underlying domain shift has been identified as the variability caused by using different whole slide scanners. The goal of the MICCAI MIDOG 2021 challenge has been to propose and evaluate methods that counter this domain shift and derive scanner-agnostic mitosis detection algorithms. The challenge used a training set of 200 cases, split across four scanning systems. As a test set, an additional 100 cases split across four scanning systems, including two previously unseen scanners, were given. The best approaches performed on an expert level, with the winning algorithm yielding an F_1 score of 0.748 (CI95: 0.704-0.781). In this paper, we evaluate and compare the approaches that were submitted to the challenge and identify methodological factors contributing to better performance.
['Katharina Breininger', 'Mitko Veta', 'Xiyue Wang', 'Sen yang', 'April Khademi', 'Salar Razavi', 'Jingxin Liu', 'Xi Long', 'YuBo Wang', 'Jingtang Liang', 'Viktor H. Koelzer', 'Maxime W. Lafarge', 'Satoshi Kondo', 'Thomas Wittenberg', 'Jakob Dexl', 'Nasir Rajpoot', 'Mostafa Jahanifar', 'Saima Ben Hadj', 'Rutger H. J. Fick', 'Fattaneh Pourakpour', 'Ramin Nateghi', 'Jinah Park', 'Youjin Chung', 'Nishant Ravikumar', 'Jack Breen', 'Andreas Maier', 'Taryn A. Donovan', 'Christian Marzahl', 'Frauke Wilm', 'Francesco Ciompi', 'Natalie ter Hoeve', 'Robert Klopleisch', 'Christof A. Bertram', 'Nikolas Stathonikos', 'Marc Aubreville']
2022-04-06
null
null
null
null
['mitosis-detection']
['medical']
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[15.126108169555664, -3.0650148391723633]
d8e2407b-bcef-4925-94e5-6264bc1211c8
forward-compatible-few-shot-class-incremental
2203.06953
null
https://arxiv.org/abs/2203.06953v1
https://arxiv.org/pdf/2203.06953v1.pdf
Forward Compatible Few-Shot Class-Incremental Learning
Novel classes frequently arise in our dynamically changing world, e.g., new users in the authentication system, and a machine learning model should recognize new classes without forgetting old ones. This scenario becomes more challenging when new class instances are insufficient, which is called few-shot class-incremental learning (FSCIL). Current methods handle incremental learning retrospectively by making the updated model similar to the old one. By contrast, we suggest learning prospectively to prepare for future updates, and propose ForwArd Compatible Training (FACT) for FSCIL. Forward compatibility requires future new classes to be easily incorporated into the current model based on the current stage data, and we seek to realize it by reserving embedding space for future new classes. In detail, we assign virtual prototypes to squeeze the embedding of known classes and reserve for new ones. Besides, we forecast possible new classes and prepare for the updating process. The virtual prototypes allow the model to accept possible updates in the future, which act as proxies scattered among embedding space to build a stronger classifier during inference. FACT efficiently incorporates new classes with forward compatibility and meanwhile resists forgetting of old ones. Extensive experiments validate FACT's state-of-the-art performance. Code is available at: https://github.com/zhoudw-zdw/CVPR22-Fact
['De-Chuan Zhan', 'ShiLiang Pu', 'Liang Ma', 'Han-Jia Ye', 'Fu-Yun Wang', 'Da-Wei Zhou']
2022-03-14
null
http://openaccess.thecvf.com//content/CVPR2022/html/Zhou_Forward_Compatible_Few-Shot_Class-Incremental_Learning_CVPR_2022_paper.html
http://openaccess.thecvf.com//content/CVPR2022/papers/Zhou_Forward_Compatible_Few-Shot_Class-Incremental_Learning_CVPR_2022_paper.pdf
cvpr-2022-1
['few-shot-class-incremental-learning']
['methodology']
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[9.843206405639648, 3.3978559970855713]
0d95698b-9a00-4429-91e1-25647540a628
action-recognition-in-video-sequences-using
null
null
https://ieeexplore.ieee.org/abstract/document/8121994
https://ieeexplore.ieee.org/document/8121994
Action Recognition in Video Sequences using Deep Bi-Directional LSTM With CNN Features
Recurrent neural network (RNN) and long short-term memory (LSTM) have achieved great success in processing sequential multimedia data and yielded the state-of-the-art results in speech recognition, digital signal processing, video processing, and text data analysis. In this paper, we propose a novel action recognition method by processing the video data using convolutional neural network (CNN) and deep bidirectional LSTM (DB-LSTM) network. First, deep features are extracted from every sixth frame of the videos, which helps reduce the redundancy and complexity. Next, the sequential information among frame features is learnt using DB-LSTM network, where multiple layers are stacked together in both forward pass and backward pass of DB-LSTM to increase its depth. The proposed method is capable of learning long term sequences and can process lengthy videos by analyzing features for a certain time interval. Experimental results show significant improvements in action recognition using the proposed method on three benchmark data sets including UCF-101, YouTube 11 Actions, and HMDB51 compared with the state-of-the-art action recognition methods.
['Sung Wook Baik', 'Muhammad Sajjad', 'Khan Muhammad', 'Jamil Ahmad', 'Amin Ullah']
2017-11-28
null
null
null
ieee-access-2017-11
['action-recognition-in-videos']
['computer-vision']
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[8.44186782836914, 0.3907858729362488]
1a7acfcb-b3d7-4324-a771-51af3988ee42
in-n-out-towards-good-initialization-for
2106.13953
null
https://arxiv.org/abs/2106.13953v3
https://arxiv.org/pdf/2106.13953v3.pdf
In-N-Out: Towards Good Initialization for Inpainting and Outpainting
In computer vision, recovering spatial information by filling in masked regions, e.g., inpainting, has been widely investigated for its usability and wide applicability to other various applications: image inpainting, image extrapolation, and environment map estimation. Most of them are studied separately depending on the applications. Our focus, however, is on accommodating the opposite task, e.g., image outpainting, which would benefit the target applications, e.g., image inpainting. Our self-supervision method, In-N-Out, is summarized as a training approach that leverages the knowledge of the opposite task into the target model. We empirically show that In-N-Out -- which explores the complementary information -- effectively takes advantage over the traditional pipelines where only task-specific learning takes place in training. In experiments, we compare our method to the traditional procedure and analyze the effectiveness of our method on different applications: image inpainting, image extrapolation, and environment map estimation. For these tasks, we demonstrate that In-N-Out consistently improves the performance of the recent works with In-N-Out self-supervision to their training procedure. Also, we show that our approach achieves better results than an existing training approach for outpainting.
['Sung-Eui Yoon', 'Woobin Im', 'Changho Jo']
2021-06-26
null
null
null
null
['image-outpainting']
['computer-vision']
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[11.090998649597168, -0.8745765089988708]
7df981a2-7bfc-454d-ab2e-0e159304275b
disco-distilled-student-models-co-training
2305.12074
null
https://arxiv.org/abs/2305.12074v1
https://arxiv.org/pdf/2305.12074v1.pdf
DisCo: Distilled Student Models Co-training for Semi-supervised Text Mining
Many text mining models are constructed by fine-tuning a large deep pre-trained language model (PLM) in downstream tasks. However, a significant challenge is maintaining performance when we use a lightweight model with limited labeled samples. We present DisCo, a semi-supervised learning (SSL) framework for fine-tuning a cohort of small student models generated from a large PLM using knowledge distillation. Our key insight is to share complementary knowledge among distilled student cohorts to promote their SSL effectiveness. DisCo employs a novel co-training technique to optimize multiple small student models by promoting knowledge sharing among students under diversified views: model views produced by different distillation strategies and data views produced by various input augmentations. We evaluate DisCo on both semi-supervised text classification and extractive summarization tasks. Experimental results show that DisCo can produce student models that are 7.6 times smaller and 4.8 times faster in inference than the baseline PLMs while maintaining comparable performance. We also show that DisCo-generated student models outperform the similar-sized models elaborately tuned in distinct tasks.
['Zheng Wang', 'Ting Deng', 'Weiyi Yang', 'Chenghua Lin', 'JianXin Li', 'Qianren Mao', 'Weifeng Jiang']
2023-05-20
null
null
null
null
['semi-supervised-text-classification-1', 'extractive-summarization']
['natural-language-processing', 'natural-language-processing']
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[11.899808883666992, 8.99242115020752]
522cecca-ad41-4ef4-9fd8-c29fba7ca728
reference-limited-compositional-zero-shot
2208.10046
null
https://arxiv.org/abs/2208.10046v2
https://arxiv.org/pdf/2208.10046v2.pdf
Reference-Limited Compositional Zero-Shot Learning
Compositional zero-shot learning (CZSL) refers to recognizing unseen compositions of known visual primitives, which is an essential ability for artificial intelligence systems to learn and understand the world. While considerable progress has been made on existing benchmarks, we suspect whether popular CZSL methods can address the challenges of few-shot and few referential compositions, which is common when learning in real-world unseen environments. To this end, we study the challenging reference-limited compositional zero-shot learning (RL-CZSL) problem in this paper, i.e., given limited seen compositions that contain only a few samples as reference, unseen compositions of observed primitives should be identified. We propose a novel Meta Compositional Graph Learner (MetaCGL) that can efficiently learn the compositionality from insufficient referential information and generalize to unseen compositions. Besides, we build a benchmark with two new large-scale datasets that consist of natural images with diverse compositional labels, providing more realistic environments for RL-CZSL. Extensive experiments in the benchmarks show that our method achieves state-of-the-art performance in recognizing unseen compositions when reference is limited for compositional learning.
['Donglin Wang', 'Qiyao Wei', 'Siteng Huang']
2022-08-22
null
null
null
null
['compositional-zero-shot-learning']
['computer-vision']
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[10.238746643066406, 2.258432388305664]
827bafa3-e62c-4c24-a53e-b068c6d53234
video-violence-recognition-and-localization
2202.02212
null
https://arxiv.org/abs/2202.02212v4
https://arxiv.org/pdf/2202.02212v4.pdf
Video Violence Recognition and Localization Using a Semi-Supervised Hard Attention Model
The significant growth of surveillance camera networks necessitates scalable AI solutions to efficiently analyze the large amount of video data produced by these networks. As a typical analysis performed on surveillance footage, video violence detection has recently received considerable attention. The majority of research has focused on improving existing methods using supervised methods, with little, if any, attention to the semi-supervised learning approaches. In this study, a reinforcement learning model is introduced that can outperform existing models through a semi-supervised approach. The main novelty of the proposed method lies in the introduction of a semi-supervised hard attention mechanism. Using hard attention, the essential regions of videos are identified and separated from the non-informative parts of the data. A model's accuracy is improved by removing redundant data and focusing on useful visual information in a higher resolution. Implementing hard attention mechanisms using semi-supervised reinforcement learning algorithms eliminates the need for attention annotations in video violence datasets, thus making them readily applicable. The proposed model utilizes a pre-trained I3D backbone to accelerate and stabilize the training process. The proposed model achieved state-of-the-art accuracy of 90.4% and 98.7% on RWF and Hockey datasets, respectively.
['Ehsan Nazerfard', 'Hamid Mohammadi']
2022-02-04
null
null
null
null
['hard-attention']
['methodology']
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[8.00833797454834, 0.8244011402130127]
c902686e-05a7-4524-8f5f-94fbf57604cd
190406197
1904.06197
null
https://arxiv.org/abs/1904.06197v2
https://arxiv.org/pdf/1904.06197v2.pdf
Simulation of hyperelastic materials in real-time using Deep Learning
The finite element method (FEM) is among the most commonly used numerical methods for solving engineering problems. Due to its computational cost, various ideas have been introduced to reduce computation times, such as domain decomposition, parallel computing, adaptive meshing, and model order reduction. In this paper we present U-Mesh: a data-driven method based on a U-Net architecture that approximates the non-linear relation between a contact force and the displacement field computed by a FEM algorithm. We show that deep learning, one of the latest machine learning methods based on artificial neural networks, can enhance computational mechanics through its ability to encode highly non-linear models in a compact form. Our method is applied to two benchmark examples: a cantilever beam and an L-shape subject to moving punctual loads. A comparison between our method and proper orthogonal decomposition (POD) is done through the paper. The results show that U-Mesh can perform very fast simulations on various geometries, mesh resolutions and number of input forces with very small errors.
['Stéphane Cotin', 'Pablo Márquez-Neila', 'Andrea Mendizabal']
2019-04-10
null
null
null
null
['cantilever-beam']
['miscellaneous']
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[6.320991516113281, 3.3872530460357666]
32fd29c5-ee46-4f0a-99e0-51d6d248eb5e
objective-assessment-of-spatial-audio-quality
2212.01451
null
https://arxiv.org/abs/2212.01451v1
https://arxiv.org/pdf/2212.01451v1.pdf
Objective Assessment of Spatial Audio Quality using Directional Loudness Maps
This work introduces a feature extracted from stereophonic/binaural audio signals aiming to represent a measure of perceived quality degradation in processed spatial auditory scenes. The feature extraction technique is based on a simplified stereo signal model considering auditory events positioned towards a given direction in the stereo field using amplitude panning (AP) techniques. We decompose the stereo signal into a set of directional signals for given AP values in the Short-Time Fourier Transform domain and calculate their overall loudness to form a directional loudness representation or maps. Then, we compare directional loudness maps of a reference signal and a deteriorated version to derive a distortion measure aiming to describe the associated perceived degradation scores reported in listening tests. The measure is then tested on an extensive listening test database with stereo signals processed by state-of-the-art perceptual audio codecs using non waveform-preserving techniques such as bandwidth extension and joint stereo coding, known for presenting a challenge to existing quality predictors. Results suggest that the derived distortion measure can be incorporated as an extension to existing automated perceptual quality assessment algorithms for improving prediction on spatially coded audio signals.
['Jürgen Herre', 'Pablo M. Delgado']
2022-12-02
null
null
null
null
['bandwidth-extension', 'bandwidth-extension']
['audio', 'speech']
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[15.339091300964355, 5.614477634429932]
24da084e-b47c-4591-be91-a2ad3adeb65d
meta-neural-network-for-realtime-and-passive
1909.07122
null
https://arxiv.org/abs/1909.07122v1
https://arxiv.org/pdf/1909.07122v1.pdf
Meta-neural-network for Realtime and Passive Deep-learning-based Object Recognition
Deep-learning recently show great success across disciplines yet conventionally require time-consuming computer processing or bulky-sized diffractive elements. Here we theoretically propose and experimentally demonstrate a purely-passive "meta-neural-network" with compactness and high-resolution for real-time recognizing complicated objects by analyzing acoustic scattering. We prove our meta-neural-network mimics standard neural network despite its small footprint, thanks to unique capability of its metamaterial unit cells, dubbed "meta-neurons", to produce deep-subwavelength-distribution of discrete phase shift as learnable parameters during training. The resulting device exhibits the "intelligence" to perform desired tasks with potential to address the current trade-off between reducing device's size, cost and energy consumption and increasing recognition speed and accuracy, showcased by an example of handwritten digit recognition. Our mechanism opens the route to new metamaterial-based deep-learning paradigms and enable conceptual devices such as smart transducers automatically analyzing signals, with far-reaching implications for acoustics, optics and related fields.
['Xue-Feng Zhu', 'Yujiang Ding', 'Jingkai Weng', 'Bin Liang', 'Jing Yang', 'Jianchun Cheng', 'Chengbo Hu']
2019-09-16
null
null
null
null
['handwritten-digit-recognition']
['computer-vision']
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[8.191153526306152, 2.4575695991516113]
4782a326-0755-455c-944d-4594c37ae53a
neural-modular-control-for-embodied-question
1810.11181
null
https://arxiv.org/abs/1810.11181v2
https://arxiv.org/pdf/1810.11181v2.pdf
Neural Modular Control for Embodied Question Answering
We present a modular approach for learning policies for navigation over long planning horizons from language input. Our hierarchical policy operates at multiple timescales, where the higher-level master policy proposes subgoals to be executed by specialized sub-policies. Our choice of subgoals is compositional and semantic, i.e. they can be sequentially combined in arbitrary orderings, and assume human-interpretable descriptions (e.g. 'exit room', 'find kitchen', 'find refrigerator', etc.). We use imitation learning to warm-start policies at each level of the hierarchy, dramatically increasing sample efficiency, followed by reinforcement learning. Independent reinforcement learning at each level of hierarchy enables sub-policies to adapt to consequences of their actions and recover from errors. Subsequent joint hierarchical training enables the master policy to adapt to the sub-policies. On the challenging EQA (Das et al., 2018) benchmark in House3D (Wu et al., 2018), requiring navigating diverse realistic indoor environments, our approach outperforms prior work by a significant margin, both in terms of navigation and question answering.
['Stefan Lee', 'Dhruv Batra', 'Georgia Gkioxari', 'Devi Parikh', 'Abhishek Das']
2018-10-26
null
null
null
null
['embodied-question-answering']
['computer-vision']
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[4.226853370666504, 1.253157377243042]
ddc34d61-a7c3-46c4-8222-7b2291223a6c
noise-blind-image-deblurring
null
null
http://openaccess.thecvf.com/content_cvpr_2017/html/Jin_Noise-Blind_Image_Deblurring_CVPR_2017_paper.html
http://openaccess.thecvf.com/content_cvpr_2017/papers/Jin_Noise-Blind_Image_Deblurring_CVPR_2017_paper.pdf
Noise-Blind Image Deblurring
We present a novel approach to noise-blind deblurring, the problem of deblurring an image with known blur, but unknown noise level. We introduce an efficient and robust solution based on a Bayesian framework using a smooth generalization of the 0-1 loss. A novel bound allows the calculation of very high-dimensional integrals in closed form. It avoids the degeneracy of Maximum a-Posteriori (MAP) estimates and leads to an effective noise-adaptive scheme. Moreover, we drastically accelerate our algorithm by using Majorization Minimization (MM) without introducing any approximation or boundary artifacts. We further speed up convergence by turning our algorithm into a neural network termed GradNet, which is highly parallelizable and can be efficiently trained. We demonstrate that our noise-blind formulation can be integrated with different priors and significantly improves existing deblurring algorithms in the noise-blind and in the known-noise case. Furthermore, GradNet leads to state-of-the-art performance across different noise levels, while retaining high computational efficiency.
['Paolo Favaro', 'Stefan Roth', 'Meiguang Jin']
2017-07-01
null
null
null
cvpr-2017-7
['blind-image-deblurring']
['computer-vision']
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[11.664325714111328, -2.642866849899292]
544aba5d-cd86-4582-87ef-1d3109d21990
single-anchor-uwb-localization-using-channel
2211.04246
null
https://arxiv.org/abs/2211.04246v1
https://arxiv.org/pdf/2211.04246v1.pdf
Single-anchor UWB Localization using Channel Impulse Response Distributions
Ultra-wideband (UWB) devices are widely used in indoor localization scenarios. Single-anchor UWB localization shows advantages because of its simple system setup compared to conventional two-way ranging (TWR) and trilateration localization methods. In this work, we focus on single-anchor UWB localization methods that learn statistical features of the channel impulse response (CIR) in different location areas using a Gaussian mixture model (GMM). We show that by learning the joint distributions of the amplitudes of different delay components, we achieve a more accurate location estimate compared to considering each delay bin independently. Moreover, we develop a similarity metric between sets of CIRs. With this set-based similarity metric, we can further improve the estimation performance, compared to treating each snapshot separately. We showcase the advantages of the proposed methods in multiple application scenarios.
['Andreas Burg', 'Alexios Balatsoukas-Stimming', 'Sitian Li']
2022-11-08
null
null
null
null
['indoor-localization']
['computer-vision']
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[6.3155598640441895, 1.048790693283081]
9a3dd177-4c61-4664-89dc-c8283625f513
android-malware-detection-using-autoencoder
1901.07315
null
http://arxiv.org/abs/1901.07315v1
http://arxiv.org/pdf/1901.07315v1.pdf
Android Malware Detection Using Autoencoder
Smartphones have become an intrinsic part of human's life. The smartphone unifies diverse advanced characteristics. It enables users to store various data such as photos, health data, credential bank data, and personal information. The Android operating system is the prevalent mobile operating system and, in the meantime, the most targeted operating system by malware developers. Recently the unparalleled development of Android malware put pressure on researchers to propose effective methods to suppress the spread of the malware. In this paper, we propose a deep learning approach for Android malware detection. The proposed approach investigates five different feature sets and applies Autoencoder to identify malware. The experimental results show that the proposed approach can identify malware with high accuracy.
['Abdelmonim Naway', 'Yuancheng Li']
2019-01-14
null
null
null
null
['android-malware-detection']
['miscellaneous']
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[14.426189422607422, 9.682908058166504]
08db6033-c2a6-45d0-be5d-cb939bffb281
the-nni-query-by-example-system-for-mediaeval
null
null
http://www.npu-aslp.org/lxie/papers/2014QUESST-NNI.pdf
http://www.npu-aslp.org/lxie/papers/2014QUESST-NNI.pdf
The NNI Query-by-Example System for MediaEval 2014
In this paper we describe the system proposed by NNI (NWPU-NTU-I2R) team for the QUESST task within the Mediaeval 2014 evaluation. To solve the problem, we used both dynamic time warping (DTW) and symbolic search (SS) based approaches. The DTW system performs template matching using subsequence DTW algorithm and posterior representations. The symbolic search is performed on phone sequences generated by phone recognizers. For both symbolic and DTW search, partial sequence matching is performed to reduce missing rate, especially for query type 2 and 3. After fusing 9 DTW systems, 7 symbolic systems, and query length side information, we obtained 0.6023 actual normalized cross entropy (actCnxe) for all queries combined. For type 3 complex queries, we achieved 0.7252 actCnxe.
['Haizhou Li', 'Eng Siong Chng', 'Bin Ma', 'Su Jun Leow', 'Lei Wang', 'Hang Lv', 'JIA YU', 'Hongjie Chen', 'Cheung-Chi Leung', 'Lei Xie', 'Xiong Xiao', 'HaiHua Xu', 'Peng Yang']
2014-10-16
null
null
null
null
['template-matching']
['computer-vision']
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[14.301230430603027, 6.448639869689941]
56149a83-5c92-4192-a9f0-5108ebae38e1
evolutionary-deep-nets-for-non-intrusive-load
2303.03538
null
https://arxiv.org/abs/2303.03538v1
https://arxiv.org/pdf/2303.03538v1.pdf
Evolutionary Deep Nets for Non-Intrusive Load Monitoring
Non-Intrusive Load Monitoring (NILM) is an energy efficiency technique to track electricity consumption of an individual appliance in a household by one aggregated single, such as building level meter readings. The goal of NILM is to disaggregate the appliance from the aggregated singles by computational method. In this work, deep learning approaches are implemented to operate the desegregations. Deep neural networks, convolutional neural networks, and recurrent neural networks are employed for this operation. Additionally, sparse evolutionary training is applied to accelerate training efficiency of each deep learning model. UK-Dale dataset is used for this work.
['Kenneth A. Loparo', 'Jinsong Wang']
2023-03-06
null
null
null
null
['non-intrusive-load-monitoring', 'non-intrusive-load-monitoring', 'non-intrusive-load-monitoring']
['knowledge-base', 'miscellaneous', 'time-series']
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[16.061491012573242, 7.576128959655762]
930932f3-6953-490c-99d2-6e404a20badb
scalable-discovery-of-time-series-shapelets
1503.03238
null
http://arxiv.org/abs/1503.03238v1
http://arxiv.org/pdf/1503.03238v1.pdf
Scalable Discovery of Time-Series Shapelets
Time-series classification is an important problem for the data mining community due to the wide range of application domains involving time-series data. A recent paradigm, called shapelets, represents patterns that are highly predictive for the target variable. Shapelets are discovered by measuring the prediction accuracy of a set of potential (shapelet) candidates. The candidates typically consist of all the segments of a dataset, therefore, the discovery of shapelets is computationally expensive. This paper proposes a novel method that avoids measuring the prediction accuracy of similar candidates in Euclidean distance space, through an online clustering pruning technique. In addition, our algorithm incorporates a supervised shapelet selection that filters out only those candidates that improve classification accuracy. Empirical evidence on 45 datasets from the UCR collection demonstrate that our method is 3-4 orders of magnitudes faster than the fastest existing shapelet-discovery method, while providing better prediction accuracy.
['Lars Schmidt-Thieme', 'Josif Grabocka', 'Martin Wistuba']
2015-03-11
null
null
null
null
['online-clustering']
['computer-vision']
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[7.292686462402344, 3.346958637237549]
ad03a8b2-7379-4ff5-8e70-18de1a020efb
moore-model-based-offline-to-online
2201.10070
null
https://arxiv.org/abs/2201.10070v1
https://arxiv.org/pdf/2201.10070v1.pdf
MOORe: Model-based Offline-to-Online Reinforcement Learning
With the success of offline reinforcement learning (RL), offline trained RL policies have the potential to be further improved when deployed online. A smooth transfer of the policy matters in safe real-world deployment. Besides, fast adaptation of the policy plays a vital role in practical online performance improvement. To tackle these challenges, we propose a simple yet efficient algorithm, Model-based Offline-to-Online Reinforcement learning (MOORe), which employs a prioritized sampling scheme that can dynamically adjust the offline and online data for smooth and efficient online adaptation of the policy. We provide a theoretical foundation for our algorithms design. Experiment results on the D4RL benchmark show that our algorithm smoothly transfers from offline to online stages while enabling sample-efficient online adaption, and also significantly outperforms existing methods.
['Chongjie Zhang', 'Bin Wang', 'Chao Wang', 'Yihuan Mao']
2022-01-25
null
null
null
null
['d4rl']
['robots']
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[4.089633464813232, 2.2403101921081543]
f2ba79db-44e1-4911-99fe-0b18ac993d33
reducing-hallucinations-in-neural-machine
2211.09878
null
https://arxiv.org/abs/2211.09878v2
https://arxiv.org/pdf/2211.09878v2.pdf
Reducing Hallucinations in Neural Machine Translation with Feature Attribution
Neural conditional language generation models achieve the state-of-the-art in Neural Machine Translation (NMT) but are highly dependent on the quality of parallel training dataset. When trained on low-quality datasets, these models are prone to various error types, including hallucinations, i.e. outputs that are fluent, but unrelated to the source sentences. These errors are particularly dangerous, because on the surface the translation can be perceived as a correct output, especially if the reader does not understand the source language. We present a case study focusing on model understanding and regularisation to reduce hallucinations in NMT. We first use feature attribution methods to study the behaviour of an NMT model that produces hallucinations. We then leverage these methods to propose a novel loss function that substantially helps reduce hallucinations and does not require retraining the model from scratch.
['Lucia Specia', 'Marina Fomicheva', 'Joël Tang']
2022-11-17
null
null
null
null
['nmt']
['computer-code']
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[11.703813552856445, 9.913617134094238]
ffd465c6-6f04-4a56-ba42-1ed5bd877490
detection-of-word-adversarial-examples-in
2203.01677
null
https://arxiv.org/abs/2203.01677v1
https://arxiv.org/pdf/2203.01677v1.pdf
Detection of Word Adversarial Examples in Text Classification: Benchmark and Baseline via Robust Density Estimation
Word-level adversarial attacks have shown success in NLP models, drastically decreasing the performance of transformer-based models in recent years. As a countermeasure, adversarial defense has been explored, but relatively few efforts have been made to detect adversarial examples. However, detecting adversarial examples may be crucial for automated tasks (e.g. review sentiment analysis) that wish to amass information about a certain population and additionally be a step towards a robust defense system. To this end, we release a dataset for four popular attack methods on four datasets and four models to encourage further research in this field. Along with it, we propose a competitive baseline based on density estimation that has the highest AUC on 29 out of 30 dataset-attack-model combinations. Source code is available in https://github.com/anoymous92874838/text-adv-detection.
['Nojun Kwak', 'Jiho Jang', 'Jangho Kim', 'KiYoon Yoo']
2022-03-03
null
null
null
null
['adversarial-defense']
['adversarial']
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[6.033651351928711, 8.070252418518066]
68e63160-b0c7-4b05-b6f7-456a37b202e1
on-the-importance-of-distinguishing-word
null
null
https://aclanthology.org/N19-1222
https://aclanthology.org/N19-1222.pdf
On the Importance of Distinguishing Word Meaning Representations: A Case Study on Reverse Dictionary Mapping
Meaning conflation deficiency is one of the main limiting factors of word representations which, given their widespread use at the core of many NLP systems, can lead to inaccurate semantic understanding of the input text and inevitably hamper the performance. Sense representations target this problem. However, their potential impact has rarely been investigated in downstream NLP applications. Through a set of experiments on a state-of-the-art reverse dictionary system based on neural networks, we show that a simple adjustment aimed at addressing the meaning conflation deficiency can lead to substantial improvements.
['Mohammad Taher Pilehvar']
2019-06-01
null
null
null
naacl-2019-6
['reverse-dictionary']
['natural-language-processing']
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[10.408653259277344, 8.91614818572998]
71bad3c0-04a1-4770-af22-53b2a8f4370a
study-of-list-based-omp-and-an-enhanced-model
2105.03774
null
https://arxiv.org/abs/2105.03774v1
https://arxiv.org/pdf/2105.03774v1.pdf
Study of List-Based OMP and an Enhanced Model for Direction Finding with Non-Uniform Arrays
This paper proposes an enhanced coarray transformation model (EDCTM) and a mixed greedy maximum likelihood algorithm called List-Based Maximum Likelihood Orthogonal Matching Pursuit (LBML-OMP) for direction-of-arrival estimation with non-uniform linear arrays (NLAs). The proposed EDCTM approach obtains improved estimates when Khatri-Rao product-based models are used to generate difference coarrays under the assumption of uncorrelated sources. In the proposed LBML-OMP technique, for each iteration a set of candidates is generated based on the correlation-maximization between the dictionary and the residue vector. LBML-OMP then chooses the best candidate based on a reduced-complexity asymptotic maximum likelihood decision rule. Simulations show the improved results of EDCTM over existing approaches and that LBML-OMP outperforms existing sparse recovery algorithms as well as Spatial Smoothing Multiple Signal Classification with NLAs.
['R. C. de Lamare', 'W. S. Leite']
2021-05-08
null
null
null
null
['direction-of-arrival-estimation']
['audio']
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[6.480166912078857, 1.354430913925171]
870a2c10-2339-43ae-8816-f68fe7832ce8
global-and-local-relative-position-embedding
null
null
https://www.ecva.net/papers/eccv_2020/papers_ECCV/html/4920_ECCV_2020_paper.php
https://www.ecva.net/papers/eccv_2020/papers_ECCV/papers/123700171.pdf
Global-and-Local Relative Position Embedding for Unsupervised Video Summarization
In order to summarize a content video properly, it is important to grasp the sequential structure of video as well as the long-term dependency between frames. The necessity of them is more obvious, especially for unsupervised learning. One possible solution is to utilize a well-known technique in the field of natural language processing for long-term dependency and sequential property: self-attention with relative position embedding (RPE). However, compared to natural language processing, video summarization requires capturing a much longer length of the global context. In this paper, we therefore present a novel input decomposition strategy, which samples the input both globally and locally. This provides an effective temporal window for RPE to operate and improves overall computational efficiency significantly. By combining both Global-and-Local input decomposition and RPE together, we come up with GL-RPE. Our approach allows the network to capture both local and global interdependencies between video frames effectively. Since GL-RPE can be easily integrated into the existing methods, we apply it to two different unsupervised backbones. We provide extensive ablation studies and visual analysis to verify the effectiveness of the proposals. We demonstrate our approach achieves new state-of-the-art performance using the recently proposed rank order-based metrics: Kendall's $ au$ and Spearman's $ ho$. Furthermore, despite our method is unsupervised, we show ours perform on par with the fully-supervised method.
['Sanghyun Woo', 'Yunjae Jung', 'In So Kweon', 'Donghyeon Cho']
null
null
null
null
eccv-2020-8
['unsupervised-video-summarization']
['computer-vision']
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[10.153538703918457, 0.5615969300270081]
411428cf-192a-4443-b2cc-520d4617c063
nondiscriminatory-treatment-a-straightforward
2101.10913
null
https://arxiv.org/abs/2101.10913v1
https://arxiv.org/pdf/2101.10913v1.pdf
Nondiscriminatory Treatment: a straightforward framework for multi-human parsing
Multi-human parsing aims to segment every body part of every human instance. Nearly all state-of-the-art methods follow the "detection first" or "segmentation first" pipelines. Different from them, we present an end-to-end and box-free pipeline from a new and more human-intuitive perspective. In training time, we directly do instance segmentation on humans and parts. More specifically, we introduce a notion of "indiscriminate objects with categorie" which treats humans and parts without distinction and regards them both as instances with categories. In the mask prediction, each binary mask is obtained by a combination of prototypes shared among all human and part categories. In inference time, we design a brand-new grouping post-processing method that relates each part instance with one single human instance and groups them together to obtain the final human-level parsing result. We name our method as Nondiscriminatory Treatment between Humans and Parts for Human Parsing (NTHP). Experiments show that our network performs superiorly against state-of-the-art methods by a large margin on the MHP v2.0 and PASCAL-Person-Part datasets.
['Yueming Zhang', 'Tong Zhang', 'Guoshan Zhang', 'Min Yan']
2021-01-26
null
null
null
null
['multi-human-parsing', 'human-parsing']
['computer-vision', 'computer-vision']
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[8.584108352661133, -0.02253217250108719]
ae717c30-08cf-4a8f-b579-86005a054868
dynamic-texture-analysis-for-detecting-fake
2007.15271
null
https://arxiv.org/abs/2007.15271v1
https://arxiv.org/pdf/2007.15271v1.pdf
Dynamic texture analysis for detecting fake faces in video sequences
The creation of manipulated multimedia content involving human characters has reached in the last years unprecedented realism, calling for automated techniques to expose synthetically generated faces in images and videos. This work explores the analysis of spatio-temporal texture dynamics of the video signal, with the goal of characterizing and distinguishing real and fake sequences. We propose to build a binary decision on the joint analysis of multiple temporal segments and, in contrast to previous approaches, to exploit the textural dynamics of both the spatial and temporal dimensions. This is achieved through the use of Local Derivative Patterns on Three Orthogonal Planes (LDP-TOP), a compact feature representation known to be an important asset for the detection of face spoofing attacks. Experimental analyses on state-of-the-art datasets of manipulated videos show the discriminative power of such descriptors in separating real and fake sequences, and also identifying the creation method used. Linear Support Vector Machines (SVMs) are used which, despite the lower complexity, yield comparable performance to previously proposed deep models for fake content detection.
['Giulia Boato', 'Mattia Bonomi', 'Cecilia Pasquini']
2020-07-30
null
null
null
null
['texture-classification']
['computer-vision']
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[12.514843940734863, 1.1449313163757324]
dce9490d-1e4f-4a29-ba05-3f32de1b1f7d
uctransnet-rethinking-the-skip-connections-in
2109.04335
null
https://arxiv.org/abs/2109.04335v3
https://arxiv.org/pdf/2109.04335v3.pdf
UCTransNet: Rethinking the Skip Connections in U-Net from a Channel-wise Perspective with Transformer
Most recent semantic segmentation methods adopt a U-Net framework with an encoder-decoder architecture. It is still challenging for U-Net with a simple skip connection scheme to model the global multi-scale context: 1) Not each skip connection setting is effective due to the issue of incompatible feature sets of encoder and decoder stage, even some skip connection negatively influence the segmentation performance; 2) The original U-Net is worse than the one without any skip connection on some datasets. Based on our findings, we propose a new segmentation framework, named UCTransNet (with a proposed CTrans module in U-Net), from the channel perspective with attention mechanism. Specifically, the CTrans module is an alternate of the U-Net skip connections, which consists of a sub-module to conduct the multi-scale Channel Cross fusion with Transformer (named CCT) and a sub-module Channel-wise Cross-Attention (named CCA) to guide the fused multi-scale channel-wise information to effectively connect to the decoder features for eliminating the ambiguity. Hence, the proposed connection consisting of the CCT and CCA is able to replace the original skip connection to solve the semantic gaps for an accurate automatic medical image segmentation. The experimental results suggest that our UCTransNet produces more precise segmentation performance and achieves consistent improvements over the state-of-the-art for semantic segmentation across different datasets and conventional architectures involving transformer or U-shaped framework. Code: https://github.com/McGregorWwww/UCTransNet.
['Osmar R. Zaiane', 'Jiaqi Wang', 'Peng Cao', 'Haonan Wang']
2021-09-09
null
null
null
null
['unet-segmentation']
['computer-vision']
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[14.605147361755371, -2.6272103786468506]
aa30057a-4448-4c3f-b23d-d570ca2e9226
instructeval-systematic-evaluation-of
2307.00259
null
https://arxiv.org/abs/2307.00259v1
https://arxiv.org/pdf/2307.00259v1.pdf
InstructEval: Systematic Evaluation of Instruction Selection Methods
In-context learning (ICL) performs tasks by prompting a large language model (LLM) using an instruction and a small set of annotated examples called demonstrations. Recent work has shown that the precise details of the inputs used in the prompt significantly impacts ICL, which has incentivized instruction selection algorithms. The effect of instruction-choice however is severely underexplored, with existing analyses being restricted to shallow subsets of models and tasks, which limits the generalizability of their insights. We develop an ICL evaluation suite to conduct a thorough assessment of these techniques. The suite includes 13 open-sourced LLMs of varying scales from 4 distinct model families and covers 9 different tasks, representing a range of task types across 3 categories. In this work, we evaluate the relative performance of 7 popular instruction selection methods using our benchmark over five desiderata relevant to ICL. We discover that using curated manually-written instructions and simple instructions without any task-specific descriptions often elicits superior ICL performance than that of automatic instruction-induction methods, pointing to a lack of generalizability among the latter. We release our evaluation suite for benchmarking instruction selection approaches, and call for more rigorous and generalizable methods in this space.
['Karthik Narasimhan', 'Ameet Deshpande', 'Mengzhou Xia', 'Chris Pan', 'Anirudh Ajith']
2023-07-01
null
null
null
null
['benchmarking', 'benchmarking']
['miscellaneous', 'robots']
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[10.617579460144043, 8.288359642028809]
b62ae0da-41f6-463b-8e21-d27ad8c26145
simultaneous-face-hallucination-and
2104.06534
null
https://arxiv.org/abs/2104.06534v2
https://arxiv.org/pdf/2104.06534v2.pdf
Simultaneous Face Hallucination and Translation for Thermal to Visible Face Verification using Axial-GAN
Existing thermal-to-visible face verification approaches expect the thermal and visible face images to be of similar resolution. This is unlikely in real-world long-range surveillance systems, since humans are distant from the cameras. To address this issue, we introduce the task of thermal-to-visible face verification from low-resolution thermal images. Furthermore, we propose Axial-Generative Adversarial Network (Axial-GAN) to synthesize high-resolution visible images for matching. In the proposed approach we augment the GAN framework with axial-attention layers which leverage the recent advances in transformers for modelling long-range dependencies. We demonstrate the effectiveness of the proposed method by evaluating on two different thermal-visible face datasets. When compared to related state-of-the-art works, our results show significant improvements in both image quality and face verification performance, and are also much more efficient.
['Vishal M. Patel', 'Shuowen Hu', 'Rakhil Immidisetti']
2021-04-13
null
null
null
null
['face-hallucination']
['computer-vision']
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[12.891942024230957, 0.029022470116615295]
5e57157d-f2ed-4e35-a6a6-6ef8905568ef
nus-hlt-report-for-activitynet-challenge-2021
null
null
http://research.google.com/ava/2021/S3_NUS_Report_AVA_ActiveSpeaker_2021.pdf
http://research.google.com/ava/2021/S3_NUS_Report_AVA_ActiveSpeaker_2021.pdf
NUS-HLT Report for ActivityNet Challenge 2021 AVA (Speaker)
Active speaker detection (ASD) seeks to detect who is speaking in a visual scene of one or more speakers. The successful ASD depends on accurate interpretation of short-term and long-term audio and visual information, as well as audiovisual interaction. Unlike the prior work where systems makedecision instantaneously using short-term features, we propose a novel framework, named TalkNet, that makes decision by taking both short-term and long-term features into consideration. TalkNet consists of audio and visual temporal encoders for feature representation, audio-visual cross-attention mechanism for inter-modality interaction, and a self-attention mechanism to capture long-term speaking evidence. The experiments demonstrate that TalkNet achieves 3.5% and 3.0% improvement over the state-of-the-art systems on the AVA-ActiveSpeaker validation and test dataset, respectively. We will release the codes, the models and data logs.
['Haizhou Li', 'Mike Zheng Shou', 'Xinyuan Qian', 'Rohan Kumar Das', 'Zexu Pan', 'Ruijie Tao']
2021-06-01
null
null
null
the-activitynet-large-scale-activity
['audio-visual-active-speaker-detection']
['computer-vision']
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[14.415695190429688, 5.14167594909668]
9add3d0d-0a37-4c33-9454-6d3685f21b4f
adversarial-networks-and-machine-learning-for
2301.11964
null
https://arxiv.org/abs/2301.11964v2
https://arxiv.org/pdf/2301.11964v2.pdf
Adversarial Networks and Machine Learning for File Classification
Correctly identifying the type of file under examination is a critical part of a forensic investigation. The file type alone suggests the embedded content, such as a picture, video, manuscript, spreadsheet, etc. In cases where a system owner might desire to keep their files inaccessible or file type concealed, we propose using an adversarially-trained machine learning neural network to determine a file's true type even if the extension or file header is obfuscated to complicate its discovery. Our semi-supervised generative adversarial network (SGAN) achieved 97.6% accuracy in classifying files across 11 different types. We also compared our network against a traditional standalone neural network and three other machine learning algorithms. The adversarially-trained network proved to be the most precise file classifier especially in scenarios with few supervised samples available. Our implementation of a file classifier using an SGAN is implemented on GitHub (https://ksaintg.github.io/SGAN-File-Classier).
['Josh Angichiodo', 'Ken St. Germain']
2023-01-27
null
null
null
null
['type']
['speech']
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[12.368803977966309, 1.0194900035858154]
8248cdc9-3210-43dd-906a-93384acd0b9c
open-source-large-language-models-outperform
2307.02179
null
https://arxiv.org/abs/2307.02179v1
https://arxiv.org/pdf/2307.02179v1.pdf
Open-Source Large Language Models Outperform Crowd Workers and Approach ChatGPT in Text-Annotation Tasks
This study examines the performance of open-source Large Language Models (LLMs) in text annotation tasks and compares it with proprietary models like ChatGPT and human-based services such as MTurk. While prior research demonstrated the high performance of ChatGPT across numerous NLP tasks, open-source LLMs like HugginChat and FLAN are gaining attention for their cost-effectiveness, transparency, reproducibility, and superior data protection. We assess these models using both zero-shot and few-shot approaches and different temperature parameters across a range of text annotation tasks. Our findings show that while ChatGPT achieves the best performance in most tasks, open-source LLMs not only outperform MTurk but also demonstrate competitive potential against ChatGPT in specific tasks.
['Fabrizio Gilardi', 'Maria Korobeynikova', 'Juan Diego Bermeo', 'Shirin Dehghani', 'Zeynab Samei', 'Maël Kubli', 'Meysam Alizadeh']
2023-07-05
null
null
null
null
['text-annotation']
['natural-language-processing']
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[9.913901329040527, 8.779406547546387]
fe97889d-d30a-4d73-8e6a-4dac5e778e86
a-graph-to-graphs-framework-for
2003.12725
null
https://arxiv.org/abs/2003.12725v3
https://arxiv.org/pdf/2003.12725v3.pdf
A Graph to Graphs Framework for Retrosynthesis Prediction
A fundamental problem in computational chemistry is to find a set of reactants to synthesize a target molecule, a.k.a. retrosynthesis prediction. Existing state-of-the-art methods rely on matching the target molecule with a large set of reaction templates, which are very computationally expensive and also suffer from the problem of coverage. In this paper, we propose a novel template-free approach called G2Gs by transforming a target molecular graph into a set of reactant molecular graphs. G2Gs first splits the target molecular graph into a set of synthons by identifying the reaction centers, and then translates the synthons to the final reactant graphs via a variational graph translation framework. Experimental results show that G2Gs significantly outperforms existing template-free approaches by up to 63% in terms of the top-1 accuracy and achieves a performance close to that of state-of-the-art template based approaches, but does not require domain knowledge and is much more scalable.
['Ming Zhang', 'Jian Tang', 'Hongyu Guo', 'Chence Shi', 'Minkai Xu']
2020-03-28
null
https://proceedings.icml.cc/static/paper_files/icml/2020/4152-Paper.pdf
https://proceedings.icml.cc/static/paper_files/icml/2020/4152-Paper.pdf
icml-2020-1
['retrosynthesis']
['medical']
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[4.53211784362793, 6.104106903076172]
3921771a-58fd-43d4-82d3-8204fd5ba1ad
ddm-net-end-to-end-learning-of-keypoint
2212.04575
null
https://arxiv.org/abs/2212.04575v2
https://arxiv.org/pdf/2212.04575v2.pdf
DDM-NET: End-to-end learning of keypoint feature Detection, Description and Matching for 3D localization
In this paper, we propose an end-to-end framework that jointly learns keypoint detection, descriptor representation and cross-frame matching for the task of image-based 3D localization. Prior art has tackled each of these components individually, purportedly aiming to alleviate difficulties in effectively train a holistic network. We design a self-supervised image warping correspondence loss for both feature detection and matching, a weakly-supervised epipolar constraints loss on relative camera pose learning, and a directional matching scheme that detects key-point features in a source image and performs coarse-to-fine correspondence search on the target image. We leverage this framework to enforce cycle consistency in our matching module. In addition, we propose a new loss to robustly handle both definite inlier/outlier matches and less-certain matches. The integration of these learning mechanisms enables end-to-end training of a single network performing all three localization components. Bench-marking our approach on public data-sets, exemplifies how such an end-to-end framework is able to yield more accurate localization that out-performs both traditional methods as well as state-of-the-art weakly supervised methods.
['Gang Hua', 'Haoxiang Li', 'Enrique Dunn', 'Li Guan', 'Xiangyu Xu']
2022-12-08
null
null
null
null
['keypoint-detection']
['computer-vision']
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[7.978281021118164, -2.1625473499298096]
0137b61c-ea2c-4187-b31d-fa5e347f0dfa
zooming-slow-mo-fast-and-accurate-one-stage
2002.11616
null
https://arxiv.org/abs/2002.11616v1
https://arxiv.org/pdf/2002.11616v1.pdf
Zooming Slow-Mo: Fast and Accurate One-Stage Space-Time Video Super-Resolution
In this paper, we explore the space-time video super-resolution task, which aims to generate a high-resolution (HR) slow-motion video from a low frame rate (LFR), low-resolution (LR) video. A simple solution is to split it into two sub-tasks: video frame interpolation (VFI) and video super-resolution (VSR). However, temporal interpolation and spatial super-resolution are intra-related in this task. Two-stage methods cannot fully take advantage of the natural property. In addition, state-of-the-art VFI or VSR networks require a large frame-synthesis or reconstruction module for predicting high-quality video frames, which makes the two-stage methods have large model sizes and thus be time-consuming. To overcome the problems, we propose a one-stage space-time video super-resolution framework, which directly synthesizes an HR slow-motion video from an LFR, LR video. Rather than synthesizing missing LR video frames as VFI networks do, we firstly temporally interpolate LR frame features in missing LR video frames capturing local temporal contexts by the proposed feature temporal interpolation network. Then, we propose a deformable ConvLSTM to align and aggregate temporal information simultaneously for better leveraging global temporal contexts. Finally, a deep reconstruction network is adopted to predict HR slow-motion video frames. Extensive experiments on benchmark datasets demonstrate that the proposed method not only achieves better quantitative and qualitative performance but also is more than three times faster than recent two-stage state-of-the-art methods, e.g., DAIN+EDVR and DAIN+RBPN.
['Yun Fu', 'Yulun Zhang', 'Yapeng Tian', 'Jan P. Allebach', 'Chenliang Xu', 'Xiaoyu Xiang']
2020-02-26
zooming-slow-mo-fast-and-accurate-one-stage-1
http://openaccess.thecvf.com/content_CVPR_2020/html/Xiang_Zooming_Slow-Mo_Fast_and_Accurate_One-Stage_Space-Time_Video_Super-Resolution_CVPR_2020_paper.html
http://openaccess.thecvf.com/content_CVPR_2020/papers/Xiang_Zooming_Slow-Mo_Fast_and_Accurate_One-Stage_Space-Time_Video_Super-Resolution_CVPR_2020_paper.pdf
cvpr-2020-6
['space-time-video-super-resolution']
['computer-vision']
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[11.016128540039062, -1.860333800315857]
3e2f38e9-5f46-414e-9a27-c861e1e60526
image-shadow-removal-using-end-to-end-deep
null
null
https://www.mdpi.com/2076-3417/9/5/1009
https://www.mdpi.com/2076-3417/9/5/1009/pdf-vor
Image Shadow Removal Using End-to-End Deep Convolutional Neural Networks
Image degradation caused by shadows is likely to cause technological issues in image segmentation and target recognition. In view of the existing shadow removal methods, there are problems such as small and trivial shadow processing, the scarcity of end-to-end automatic methods, the neglecting of light, and high-level semantic information such as materials. An end-to-end deep convolutional neural network is proposed to further improve the image shadow removal effect. The network mainly consists of two network models, an encoder–decoder network and a small refinement network. The former predicts the alpha shadow scale factor, and the latter refines to obtain sharper edge information. In addition, a new image database (remove shadow database, RSDB) is constructed; and qualitative and quantitative evaluations are made on databases such as UIUC, UCF and newly-created databases (RSDB) with various real images. Using the peak signal-to-noise ratio (PSNR) and the structural similarity (SSIM) for quantitative analysis, the algorithm has a big improvement on the PSNR and the SSIM as opposed to other methods. In terms of qualitative comparisons, the network shadow has a clearer and shadow-free image that is consistent with the original image color and texture, and the detail processing effect is much better. The experimental results show that the proposed algorithm is superior to other algorithms, and it is more robust in subjective vision and objective quantization
['Jinjiang Li', 'Meng Han', 'Hui Fan']
2019-03-11
null
null
null
null
['shadow-removal', 'image-shadow-removal']
['computer-vision', 'computer-vision']
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[10.837363243103027, -3.9728007316589355]
5147a27e-2be6-4bc7-b00a-5197d6990f69
single-image-deraining-via-scale-space
2006.05049
null
https://arxiv.org/abs/2006.05049v2
https://arxiv.org/pdf/2006.05049v2.pdf
Single Image Deraining via Scale-space Invariant Attention Neural Network
Image enhancement from degradation of rainy artifacts plays a critical role in outdoor visual computing systems. In this paper, we tackle the notion of scale that deals with visual changes in appearance of rain steaks with respect to the camera. Specifically, we revisit multi-scale representation by scale-space theory, and propose to represent the multi-scale correlation in convolutional feature domain, which is more compact and robust than that in pixel domain. Moreover, to improve the modeling ability of the network, we do not treat the extracted multi-scale features equally, but design a novel scale-space invariant attention mechanism to help the network focus on parts of the features. In this way, we summarize the most activated presence of feature maps as the salient features. Extensive experiments results on synthetic and real rainy scenes demonstrate the superior performance of our scheme over the state-of-the-arts.
['Xian-Ming Liu', 'Deming Zhai', 'Junjun Jiang', 'Bo Pang']
2020-06-09
null
null
null
null
['single-image-deraining']
['computer-vision']
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[10.907129287719727, -3.183201551437378]
d8727a9b-9e14-48cf-82de-1fd25264255d
toward-a-task-of-feedback-comment-generation
null
null
https://aclanthology.org/D19-1316
https://aclanthology.org/D19-1316.pdf
Toward a Task of Feedback Comment Generation for Writing Learning
In this paper, we introduce a novel task called feedback comment generation {---} a task of automatically generating feedback comments such as a hint or an explanatory note for writing learning for non-native learners of English. There has been almost no work on this task nor corpus annotated with feedback comments. We have taken the first step by creating learner corpora consisting of approximately 1,900 essays where all preposition errors are manually annotated with feedback comments. We have tested three baseline methods on the dataset, showing that a simple neural retrieval-based method sets a baseline performance with an F-measure of 0.34 to 0.41. Finally, we have looked into the results to explore what modifications we need to make to achieve better performance. We also have explored problems unaddressed in this work
['Ryo Nagata']
2019-11-01
null
null
null
ijcnlp-2019-11
['comment-generation']
['natural-language-processing']
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[11.734583854675293, 9.03400707244873]
5cc35e3a-426b-496b-94c7-ecedb34e25c0
breaking-shortcut-exploring-fully
2105.05838
null
https://arxiv.org/abs/2105.05838v2
https://arxiv.org/pdf/2105.05838v2.pdf
Breaking Shortcut: Exploring Fully Convolutional Cycle-Consistency for Video Correspondence Learning
Previous cycle-consistency correspondence learning methods usually leverage image patches for training. In this paper, we present a fully convolutional method, which is simpler and more coherent to the inference process. While directly applying fully convolutional training results in model collapse, we study the underline reason behind this collapse phenomenon, indicating that the absolute positions of pixels provide a shortcut to easily accomplish cycle-consistence, which hinders the learning of meaningful visual representations. To break this absolute position shortcut, we propose to apply different crops for forward and backward frames, and adopt feature warping to establish correspondence between two crops of a same frame. The former technique enforces the corresponding pixels at forward and back tracks to have different absolute positions, and the latter effectively blocks the shortcuts going between forward and back tracks. In three label propagation benchmarks for pose tracking, face landmark tracking and video object segmentation, our method largely improves the results of vanilla fully convolutional cycle-consistency method, achieving very competitive performance compared with the self-supervised state-of-the-art approaches. Our trained model and code are available at \url{https://github.com/Steve-Tod/STFC3}.
['Han Hu', 'Philip H. S. Torr', 'Zheng Zhang', 'Yue Cao', 'Zhenda Xie', 'Zhenyu Jiang', 'Yansong Tang']
2021-05-12
null
null
null
null
['landmark-tracking']
['computer-vision']
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[9.124653816223145, -0.1137237399816513]
323d5879-544e-441d-9b63-4b2aa9537960
3d-multi-object-tracking-using-graph-neural
2203.10926
null
https://arxiv.org/abs/2203.10926v2
https://arxiv.org/pdf/2203.10926v2.pdf
3D Multi-Object Tracking Using Graph Neural Networks with Cross-Edge Modality Attention
Online 3D multi-object tracking (MOT) has witnessed significant research interest in recent years, largely driven by demand from the autonomous systems community. However, 3D offline MOT is relatively less explored. Labeling 3D trajectory scene data at a large scale while not relying on high-cost human experts is still an open research question. In this work, we propose Batch3DMOT which follows the tracking-by-detection paradigm and represents real-world scenes as directed, acyclic, and category-disjoint tracking graphs that are attributed using various modalities such as camera, LiDAR, and radar. We present a multi-modal graph neural network that uses a cross-edge attention mechanism mitigating modality intermittence, which translates into sparsity in the graph domain. Additionally, we present attention-weighted convolutions over frame-wise k-NN neighborhoods as suitable means to allow information exchange across disconnected graph components. We evaluate our approach using various sensor modalities and model configurations on the challenging nuScenes and KITTI datasets. Extensive experiments demonstrate that our proposed approach yields an overall improvement of 3.3% in the AMOTA score on nuScenes thereby setting the new state-of-the-art for 3D tracking and further enhancing false positive filtering.
['Abhinav Valada', 'Martin Buchner']
2022-03-21
null
null
null
null
['3d-multi-object-tracking']
['computer-vision']
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[6.439594268798828, -2.129971981048584]
40dd74ad-9f77-45b5-a3e8-8c1ad7a0f223
using-a-supervised-method-without-supervision
2011.07954
null
https://arxiv.org/abs/2011.07954v4
https://arxiv.org/pdf/2011.07954v4.pdf
Using a Supervised Method without supervision for foreground segmentation
Neural networks are a powerful framework for foreground segmentation in video acquired by static cameras, segmenting moving objects from the background in a robust way in various challenging scenarios. The premier methods are those based on supervision requiring a final training stage on a database of tens to hundreds of manually segmented images from the specific static camera. In this work, we propose a method to automatically create an "artificial" database that is sufficient for training the supervised methods so that it performs better than current unsupervised methods. It is based on combining a weak foreground segmenter, compared to the supervised method, to extract suitable objects from the training images and randomly inserting these objects back into a background image. Test results are shown on the test sequences in CDnet.
['Michael Werman', 'Levi Kassel']
2020-10-26
null
null
null
null
['foreground-segmentation']
['computer-vision']
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[9.01090145111084, -0.4129634499549866]
7347a3de-84dd-4211-8e86-1eb987e1f5c7
self-supervised-auxiliary-learning-with-meta
2007.08294
null
https://arxiv.org/abs/2007.08294v5
https://arxiv.org/pdf/2007.08294v5.pdf
Self-supervised Auxiliary Learning with Meta-paths for Heterogeneous Graphs
Graph neural networks have shown superior performance in a wide range of applications providing a powerful representation of graph-structured data. Recent works show that the representation can be further improved by auxiliary tasks. However, the auxiliary tasks for heterogeneous graphs, which contain rich semantic information with various types of nodes and edges, have less explored in the literature. In this paper, to learn graph neural networks on heterogeneous graphs we propose a novel self-supervised auxiliary learning method using meta-paths, which are composite relations of multiple edge types. Our proposed method is learning to learn a primary task by predicting meta-paths as auxiliary tasks. This can be viewed as a type of meta-learning. The proposed method can identify an effective combination of auxiliary tasks and automatically balance them to improve the primary task. Our methods can be applied to any graph neural networks in a plug-in manner without manual labeling or additional data. The experiments demonstrate that the proposed method consistently improves the performance of link prediction and node classification on heterogeneous graphs.
['Jung-Woo Ha', 'Kyung-Min Kim', 'Jinyoung Park', 'Dasol Hwang', 'Hyunwoo J. Kim', 'Sunyoung Kwon']
2020-07-16
null
http://proceedings.neurips.cc/paper/2020/hash/74de5f915765ea59816e770a8e686f38-Abstract.html
http://proceedings.neurips.cc/paper/2020/file/74de5f915765ea59816e770a8e686f38-Paper.pdf
neurips-2020-12
['auxiliary-learning']
['methodology']
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[7.353494167327881, 6.358311653137207]
14581a94-0b91-4fe1-bd51-a71a50a748f0
local-to-global-panorama-inpainting-for
2303.10344
null
https://arxiv.org/abs/2303.10344v1
https://arxiv.org/pdf/2303.10344v1.pdf
Local-to-Global Panorama Inpainting for Locale-Aware Indoor Lighting Prediction
Predicting panoramic indoor lighting from a single perspective image is a fundamental but highly ill-posed problem in computer vision and graphics. To achieve locale-aware and robust prediction, this problem can be decomposed into three sub-tasks: depth-based image warping, panorama inpainting and high-dynamic-range (HDR) reconstruction, among which the success of panorama inpainting plays a key role. Recent methods mostly rely on convolutional neural networks (CNNs) to fill the missing contents in the warped panorama. However, they usually achieve suboptimal performance since the missing contents occupy a very large portion in the panoramic space while CNNs are plagued by limited receptive fields. The spatially-varying distortion in the spherical signals further increases the difficulty for conventional CNNs. To address these issues, we propose a local-to-global strategy for large-scale panorama inpainting. In our method, a depth-guided local inpainting is first applied on the warped panorama to fill small but dense holes. Then, a transformer-based network, dubbed PanoTransformer, is designed to hallucinate reasonable global structures in the large holes. To avoid distortion, we further employ cubemap projection in our design of PanoTransformer. The high-quality panorama recovered at any locale helps us to capture spatially-varying indoor illumination with physically-plausible global structures and fine details.
['Yanwen Guo', 'Yan Zhang', 'Zhenyu Chen', 'Jie Guo', 'Shan Yang', 'Zhen He', 'Jiayang Bai']
2023-03-18
null
null
null
null
['hdr-reconstruction']
['computer-vision']
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[10.325384140014648, -2.20694637298584]
5e11fdc3-f0a9-41b6-af94-d92ec2e9e585
data-augmentation-using-random-image-cropping-1
2111.08270
null
https://arxiv.org/abs/2111.08270v1
https://arxiv.org/pdf/2111.08270v1.pdf
Data Augmentation using Random Image Cropping for High-resolution Virtual Try-On (VITON-CROP)
Image-based virtual try-on provides the capacity to transfer a clothing item onto a photo of a given person, which is usually accomplished by warping the item to a given human pose and adjusting the warped item to the person. However, the results of real-world synthetic images (e.g., selfies) from the previous method is not realistic because of the limitations which result in the neck being misrepresented and significant changes to the style of the garment. To address these challenges, we propose a novel method to solve this unique issue, called VITON-CROP. VITON-CROP synthesizes images more robustly when integrated with random crop augmentation compared to the existing state-of-the-art virtual try-on models. In the experiments, we demonstrate that VITON-CROP is superior to VITON-HD both qualitatively and quantitatively.
['Jaegul Choo', 'Seunghwan Choi', 'Sunghyun Park', 'Taewon Kang']
2021-11-16
null
null
null
null
['image-cropping']
['computer-vision']
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[11.899657249450684, -0.8627941608428955]
e605abce-6aee-4517-b7a5-6602d104b2c4
chatgpt-edss-empathetic-dialogue-speech
2305.13724
null
https://arxiv.org/abs/2305.13724v1
https://arxiv.org/pdf/2305.13724v1.pdf
ChatGPT-EDSS: Empathetic Dialogue Speech Synthesis Trained from ChatGPT-derived Context Word Embeddings
We propose ChatGPT-EDSS, an empathetic dialogue speech synthesis (EDSS) method using ChatGPT for extracting dialogue context. ChatGPT is a chatbot that can deeply understand the content and purpose of an input prompt and appropriately respond to the user's request. We focus on ChatGPT's reading comprehension and introduce it to EDSS, a task of synthesizing speech that can empathize with the interlocutor's emotion. Our method first gives chat history to ChatGPT and asks it to generate three words representing the intention, emotion, and speaking style for each line in the chat. Then, it trains an EDSS model using the embeddings of ChatGPT-derived context words as the conditioning features. The experimental results demonstrate that our method performs comparably to ones using emotion labels or neural network-derived context embeddings learned from chat histories. The collected ChatGPT-derived context information is available at https://sarulab-speech.github.io/demo_ChatGPT_EDSS/.
['Hiroshi Saruwatari', 'Kentaro Tachibana', 'Eiji Iimori', 'Shinnosuke Takamichi', 'Yuki Saito']
2023-05-23
null
null
null
null
['chatbot', 'reading-comprehension', 'chatbot', 'speech-synthesis']
['methodology', 'natural-language-processing', 'natural-language-processing', 'speech']
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[12.89903736114502, 7.789802551269531]
d64c9848-e958-404e-88ad-dfc0f13d9158
document-intelligence-metrics-for-visually
2205.11215
null
https://arxiv.org/abs/2205.11215v1
https://arxiv.org/pdf/2205.11215v1.pdf
Document Intelligence Metrics for Visually Rich Document Evaluation
The processing of Visually-Rich Documents (VRDs) is highly important in information extraction tasks associated with Document Intelligence. We introduce DI-Metrics, a Python library devoted to VRD model evaluation comprising text-based, geometric-based and hierarchical metrics for information extraction tasks. We apply DI-Metrics to evaluate information extraction performance using publicly available CORD dataset, comparing performance of three SOTA models and one industry model. The open-source library is available on GitHub.
['Adam Karwan', 'Krzysztof Wilkosz', 'Zhuoyu Han', 'Swapnil Gupta', 'Jonathan Degange']
2022-05-23
null
null
null
null
['document-ai']
['natural-language-processing']
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[11.672042846679688, 2.6363253593444824]
8b8203aa-16e3-434d-966a-902d51269b5d
lenia-biology-of-artificial-life
1812.05433
null
https://arxiv.org/abs/1812.05433v3
https://arxiv.org/pdf/1812.05433v3.pdf
Lenia - Biology of Artificial Life
We report a new system of artificial life called Lenia (from Latin lenis "smooth"), a two-dimensional cellular automaton with continuous space-time-state and generalized local rule. Computer simulations show that Lenia supports a great diversity of complex autonomous patterns or "lifeforms" bearing resemblance to real-world microscopic organisms. More than 400 species in 18 families have been identified, many discovered via interactive evolutionary computation. They differ from other cellular automata patterns in being geometric, metameric, fuzzy, resilient, adaptive, and rule-generic. We present basic observations of the system regarding the properties of space-time and basic settings. We provide a broad survey of the lifeforms, categorize them into a hierarchical taxonomy, and map their distribution in the parameter hyperspace. We describe their morphological structures and behavioral dynamics, propose possible mechanisms of their self-propulsion, self-organization and plasticity. Finally, we discuss how the study of Lenia would be related to biology, artificial life, and artificial intelligence.
['Bert Wang-Chak Chan']
2018-12-13
null
null
null
null
['artificial-life']
['miscellaneous']
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[5.580287933349609, 4.140581130981445]
220e99e8-85a3-4951-b934-81016e560877
context-aware-relative-object-queries-to
null
null
http://openaccess.thecvf.com//content/CVPR2023/html/Choudhuri_Context-Aware_Relative_Object_Queries_To_Unify_Video_Instance_and_Panoptic_CVPR_2023_paper.html
http://openaccess.thecvf.com//content/CVPR2023/papers/Choudhuri_Context-Aware_Relative_Object_Queries_To_Unify_Video_Instance_and_Panoptic_CVPR_2023_paper.pdf
Context-Aware Relative Object Queries To Unify Video Instance and Panoptic Segmentation
Object queries have emerged as a powerful abstraction to generically represent object proposals. However, their use for temporal tasks like video segmentation poses two questions: 1) How to process frames sequentially and propagate object queries seamlessly across frames. Using independent object queries per frame doesn't permit tracking, and requires post-processing. 2) How to produce temporally consistent, yet expressive object queries that model both appearance and position changes. Using the entire video at once doesn't capture position changes and doesn't scale to long videos. As one answer to both questions we propose 'context-aware relative object queries', which are continuously propagated frame-by-frame. They seamlessly track objects and deal with occlusion and re-appearance of objects, without post-processing. Further, we find context-aware relative object queries better capture position changes of objects in motion. We evaluate the proposed approach across three challenging tasks: video instance segmentation, multi-object tracking and segmentation, and video panoptic segmentation. Using the same approach and architecture, we match or surpass state-of-the art results on the diverse and challenging OVIS, Youtube-VIS, Cityscapes-VPS, MOTS 2020 and KITTI-MOTS data.
['Alexander G. Schwing', 'Girish Chowdhary', 'Anwesa Choudhuri']
2023-01-01
null
null
null
cvpr-2023-1
['panoptic-segmentation', 'video-instance-segmentation', 'video-semantic-segmentation', 'multi-object-tracking', 'multi-object-tracking-and-segmentation']
['computer-vision', 'computer-vision', 'computer-vision', 'computer-vision', 'computer-vision']
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[9.074602127075195, -0.14852751791477203]
f446ee99-e3be-47f2-b291-17ed4fe62860
faster-voxelpose-real-time-3d-human-pose
2207.10955
null
https://arxiv.org/abs/2207.10955v1
https://arxiv.org/pdf/2207.10955v1.pdf
Faster VoxelPose: Real-time 3D Human Pose Estimation by Orthographic Projection
While the voxel-based methods have achieved promising results for multi-person 3D pose estimation from multi-cameras, they suffer from heavy computation burdens, especially for large scenes. We present Faster VoxelPose to address the challenge by re-projecting the feature volume to the three two-dimensional coordinate planes and estimating X, Y, Z coordinates from them separately. To that end, we first localize each person by a 3D bounding box by estimating a 2D box and its height based on the volume features projected to the xy-plane and z-axis, respectively. Then for each person, we estimate partial joint coordinates from the three coordinate planes separately which are then fused to obtain the final 3D pose. The method is free from costly 3D-CNNs and improves the speed of VoxelPose by ten times and meanwhile achieves competitive accuracy as the state-of-the-art methods, proving its potential in real-time applications.
['Yizhou Wang', 'Rujie Wu', 'Chunyu Wang', 'Wentao Zhu', 'Hang Ye']
2022-07-22
null
null
null
null
['3d-pose-estimation', '3d-multi-person-pose-estimation']
['computer-vision', 'computer-vision']
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[7.02118444442749, -1.0028704404830933]
aad7d170-49f4-4362-a333-1cd579a0f8b4
ogb-lsc-a-large-scale-challenge-for-machine
2103.09430
null
https://arxiv.org/abs/2103.09430v3
https://arxiv.org/pdf/2103.09430v3.pdf
OGB-LSC: A Large-Scale Challenge for Machine Learning on Graphs
Enabling effective and efficient machine learning (ML) over large-scale graph data (e.g., graphs with billions of edges) can have a great impact on both industrial and scientific applications. However, existing efforts to advance large-scale graph ML have been largely limited by the lack of a suitable public benchmark. Here we present OGB Large-Scale Challenge (OGB-LSC), a collection of three real-world datasets for facilitating the advancements in large-scale graph ML. The OGB-LSC datasets are orders of magnitude larger than existing ones, covering three core graph learning tasks -- link prediction, graph regression, and node classification. Furthermore, we provide dedicated baseline experiments, scaling up expressive graph ML models to the massive datasets. We show that expressive models significantly outperform simple scalable baselines, indicating an opportunity for dedicated efforts to further improve graph ML at scale. Moreover, OGB-LSC datasets were deployed at ACM KDD Cup 2021 and attracted more than 500 team registrations globally, during which significant performance improvements were made by a variety of innovative techniques. We summarize the common techniques used by the winning solutions and highlight the current best practices in large-scale graph ML. Finally, we describe how we have updated the datasets after the KDD Cup to further facilitate research advances. The OGB-LSC datasets, baseline code, and all the information about the KDD Cup are available at https://ogb.stanford.edu/docs/lsc/ .
['Jure Leskovec', 'Yuxiao Dong', 'Maho Nakata', 'Hongyu Ren', 'Matthias Fey', 'Weihua Hu']
2021-03-17
null
null
null
null
['graph-regression']
['graphs']
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[7.012141227722168, 6.144567012786865]
ebeed233-6985-46e2-972d-d87238d5fd2a
conditional-generative-data-free-knowledge
2112.15358
null
https://arxiv.org/abs/2112.15358v4
https://arxiv.org/pdf/2112.15358v4.pdf
Conditional Generative Data-free Knowledge Distillation
Knowledge distillation has made remarkable achievements in model compression. However, most existing methods require the original training data, which is usually unavailable due to privacy and security issues. In this paper, we propose a conditional generative data-free knowledge distillation (CGDD) framework for training lightweight networks without any training data. This method realizes efficient knowledge distillation based on conditional image generation. Specifically, we treat the preset labels as ground truth to train a conditional generator in a semi-supervised manner. The trained generator can produce specified classes of training images. For training the student network, we force it to extract the knowledge hidden in teacher feature maps, which provide crucial cues for the learning process. Moreover, an adversarial training framework for promoting distillation performance is constructed by designing several loss functions. This framework helps the student model to explore larger data space. To demonstrate the effectiveness of the proposed method, we conduct extensive experiments on different datasets. Compared with other data-free works, our work obtains state-of-the-art results on CIFAR100, Caltech101, and different versions of ImageNet datasets. The codes will be released.
['Libo Zhou', 'Yang Yang', 'Xinyi Yu', 'Linlin Ou', 'Ling Yan']
2021-12-31
null
null
null
null
['conditional-image-generation']
['computer-vision']
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[9.459946632385254, 3.3428030014038086]
78d0ee74-1187-4a24-9611-d940dfbe5ade
frequency-and-spatial-domain-based-saliency
2010.04022
null
https://arxiv.org/abs/2010.04022v1
https://arxiv.org/pdf/2010.04022v1.pdf
Frequency and Spatial domain based Saliency for Pigmented Skin Lesion Segmentation
Skin lesion segmentation can be rather a challenging task owing to the presence of artifacts, low contrast between lesion and boundary, color variegation, fuzzy skin lesion borders and heterogeneous background in dermoscopy images. In this paper, we propose a simple yet effective saliency-based approach derived in the frequency and spatial domain to detect pigmented skin lesion. Two color models are utilized for the construction of these maps. We suggest a different metric for each color model to design map in the spatial domain via color features. The map in the frequency domain is generated from aggregated images. We adopt a separate fusion scheme to combine salient features in their respective domains. Finally, two-phase saliency integration scheme is devised to combine these maps using pixelwise multiplication. Performance of the proposed method is assessed on PH2 and ISIC 2016 datasets. The outcome of the experiments suggests that the proposed scheme generate better segmentation result as compared to state-of-the-art methods.
['Zanobya N. Khan']
2020-10-08
null
null
null
null
['skin-lesion-segmentation']
['medical']
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[15.55118179321289, -2.9936695098876953]
8df6c22b-fcdc-4915-83f8-9120b684a98e
emovie-a-mandarin-emotion-speech-dataset-with
2106.09317
null
https://arxiv.org/abs/2106.09317v1
https://arxiv.org/pdf/2106.09317v1.pdf
EMOVIE: A Mandarin Emotion Speech Dataset with a Simple Emotional Text-to-Speech Model
Recently, there has been an increasing interest in neural speech synthesis. While the deep neural network achieves the state-of-the-art result in text-to-speech (TTS) tasks, how to generate a more emotional and more expressive speech is becoming a new challenge to researchers due to the scarcity of high-quality emotion speech dataset and the lack of advanced emotional TTS model. In this paper, we first briefly introduce and publicly release a Mandarin emotion speech dataset including 9,724 samples with audio files and its emotion human-labeled annotation. After that, we propose a simple but efficient architecture for emotional speech synthesis called EMSpeech. Unlike those models which need additional reference audio as input, our model could predict emotion labels just from the input text and generate more expressive speech conditioned on the emotion embedding. In the experiment phase, we first validate the effectiveness of our dataset by an emotion classification task. Then we train our model on the proposed dataset and conduct a series of subjective evaluations. Finally, by showing a comparable performance in the emotional speech synthesis task, we successfully demonstrate the ability of the proposed model.
['Zhou Zhao', 'Ming Lei', 'Rongjie Huang', 'Feiyang Chen', 'Jinglin Liu', 'Yi Ren', 'Chenye Cui']
2021-06-17
null
null
null
null
['emotional-speech-synthesis']
['speech']
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[14.246064186096191, 6.158961772918701]
645503b4-cf59-4964-9a8d-114fe41ce9c2
model-based-convolutional-de-aliasing-network
1908.02054
null
https://arxiv.org/abs/1908.02054v1
https://arxiv.org/pdf/1908.02054v1.pdf
Model-based Convolutional De-Aliasing Network Learning for Parallel MR Imaging
Parallel imaging has been an essential technique to accelerate MR imaging. Nevertheless, the acceleration rate is still limited due to the ill-condition and challenges associated with the undersampled reconstruction. In this paper, we propose a model-based convolutional de-aliasing network with adaptive parameter learning to achieve accurate reconstruction from multi-coil undersampled k-space data. Three main contributions have been made: a de-aliasing reconstruction model was proposed to accelerate parallel MR imaging with deep learning exploring both spatial redundancy and multi-coil correlations; a split Bregman iteration algorithm was developed to solve the model efficiently; and unlike most existing parallel imaging methods which rely on the accuracy of the estimated multi-coil sensitivity, the proposed method can perform parallel reconstruction from undersampled data without explicit sensitivity calculation. Evaluations were conducted on \emph{in vivo} brain dataset with a variety of undersampling patterns and different acceleration factors. Our results demonstrated that this method could achieve superior performance in both quantitative and qualitative analysis, compared to three state-of-the-art methods.
['Shan-Shan Wang', 'Yanxia Chen', 'Taohui Xiao', 'Qiegen Liu', 'Cheng Li']
2019-08-06
null
null
null
null
['de-aliasing']
['computer-vision']
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[13.534424781799316, -2.3922982215881348]
2a7a5331-292c-432b-983b-96ed1fafa048
on-random-walk-based-graph-sampling
null
null
https://ieeexplore.ieee.org/document/7113345
https://ronghuali.github.io/PaperFiles/On%20random%20walk%20based%20graph%20sampling.pdf
On Random Walk Based Graph Sampling
Random walk based graph sampling has been recognized as a fundamental technique to collect uniform node samples from a large graph. In this paper, we first present a comprehensive analysis of the drawbacks of three widely-used random walk based graph sampling algorithms, called re-weighted random walk (RW) algorithm, Metropolis-Hastings random walk (MH) algorithm and maximum-degree random walk (MD) algorithm. Then, to address the limitations of these algorithms, we propose two general random walk based algorithms, named rejection-controlled Metropolis-Hastings (RCMH) algorithm and generalized maximum-degree random walk (GMD) algorithm. We show that RCMH balances the tradeoff between the limitations of RW and MH, and GMD balances the tradeoff between the drawbacks of RW and MD. To further improve the performance of our algorithms, we integrate the so-called delayed acceptance technique and the non-backtracking random walk technique into RCMH and GMD respectively. We conduct extensive experiments over four real-world datasets, and the results demonstrate the effectiveness of the proposed algorithms.
['Rong-Hua Li', 'Jeffrey Xu Yu', 'Tan Ji', 'Rui Mao', 'Lu Qin']
2020-05-13
null
null
null
2020-5
['graph-sampling']
['graphs']
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[7.0001726150512695, 5.282647132873535]
a915e799-1a9e-403b-aa17-b7a7b956d7d2
yolo-drone-airborne-real-time-detection-of
2304.06925
null
https://arxiv.org/abs/2304.06925v1
https://arxiv.org/pdf/2304.06925v1.pdf
YOLO-Drone:Airborne real-time detection of dense small objects from high-altitude perspective
Unmanned Aerial Vehicles (UAVs), specifically drones equipped with remote sensing object detection technology, have rapidly gained a broad spectrum of applications and emerged as one of the primary research focuses in the field of computer vision. Although UAV remote sensing systems have the ability to detect various objects, small-scale objects can be challenging to detect reliably due to factors such as object size, image degradation, and real-time limitations. To tackle these issues, a real-time object detection algorithm (YOLO-Drone) is proposed and applied to two new UAV platforms as well as a specific light source (silicon-based golden LED). YOLO-Drone presents several novelties: 1) including a new backbone Darknet59; 2) a new complex feature aggregation module MSPP-FPN that incorporated one spatial pyramid pooling and three atrous spatial pyramid pooling modules; 3) and the use of Generalized Intersection over Union (GIoU) as the loss function. To evaluate performance, two benchmark datasets, UAVDT and VisDrone, along with one homemade dataset acquired at night under silicon-based golden LEDs, are utilized. The experimental results show that, in both UAVDT and VisDrone, the proposed YOLO-Drone outperforms state-of-the-art (SOTA) object detection methods by improving the mAP of 10.13% and 8.59%, respectively. With regards to UAVDT, the YOLO-Drone exhibits both high real-time inference speed of 53 FPS and a maximum mAP of 34.04%. Notably, YOLO-Drone achieves high performance under the silicon-based golden LEDs, with a mAP of up to 87.71%, surpassing the performance of YOLO series under ordinary light sources. To conclude, the proposed YOLO-Drone is a highly effective solution for object detection in UAV applications, particularly for night detection tasks where silicon-based golden light LED technology exhibits significant superiority.
['Zhengnan Jiang', 'Hanzheng Hu', 'Feng Xiong', 'Jiahui Xiong', 'Li Zhu']
2023-04-14
null
null
null
null
['real-time-object-detection']
['computer-vision']
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[8.414885520935059, -0.9942310452461243]
abf993c6-6c2b-4228-8365-593d5eac0ab5
compartmental-and-cellular-automaton-seirs
2112.02661
null
https://arxiv.org/abs/2112.02661v1
https://arxiv.org/pdf/2112.02661v1.pdf
Compartmental and cellular automaton $SEIRS$ epidemiology models for the COVID-19 pandemic with the effects of temporal immunity and vaccination
We consider the $SEIRS$ epidemiology model with such features of the COVID-19 outbreak as: abundance of unidentified infected individuals, limited time of immunity and a possibility of vaccination. Within a compartmental realization of this model, we found the disease-free and the endemic stationary states. They exist in their respective restricted regions of the le via linear stability analysis. The expression for the basic reproductive number is obtained as well. The positions and heights of a first peak for the fractions of infected individuals are obtained numerically and are fitted to simple algebraic forms, that depend on model rates. Computer simulations of a lattice-based realization for this model was performed by means of the cellular automaton algorithm. These allowed to study the effect of the quarantine measures explicitly, via changing the neighbourhood size. The attempt is made to match both quarantine and vaccination measures aimed on balanced solution for effective suppression of the pandemic.
['Taras Patsahan', 'Jaroslav Ilnytskyi']
2021-12-05
null
null
null
null
['epidemiology']
['medical']
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[5.927765369415283, 4.3777947425842285]
61e9b752-5d61-4ac2-8d1c-28cd9e8f3bf5
multi-view-inference-for-relation-extraction
2104.13579
null
https://arxiv.org/abs/2104.13579v1
https://arxiv.org/pdf/2104.13579v1.pdf
Multi-view Inference for Relation Extraction with Uncertain Knowledge
Knowledge graphs (KGs) are widely used to facilitate relation extraction (RE) tasks. While most previous RE methods focus on leveraging deterministic KGs, uncertain KGs, which assign a confidence score for each relation instance, can provide prior probability distributions of relational facts as valuable external knowledge for RE models. This paper proposes to exploit uncertain knowledge to improve relation extraction. Specifically, we introduce ProBase, an uncertain KG that indicates to what extent a target entity belongs to a concept, into our RE architecture. We then design a novel multi-view inference framework to systematically integrate local context and global knowledge across three views: mention-, entity- and concept-view. The experimental results show that our model achieves competitive performances on both sentence- and document-level relation extraction, which verifies the effectiveness of introducing uncertain knowledge and the multi-view inference framework that we design.
['Shikun Zhang', 'Canming Huang', 'Wei Ye', 'Bo Li']
2021-04-28
null
null
null
null
['document-level-relation-extraction']
['natural-language-processing']
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[9.168194770812988, 8.322436332702637]
50a0beaa-6125-4654-a4da-5a120e76a741
conceptfusion-open-set-multimodal-3d-mapping
2302.07241
null
https://arxiv.org/abs/2302.07241v2
https://arxiv.org/pdf/2302.07241v2.pdf
ConceptFusion: Open-set Multimodal 3D Mapping
Building 3D maps of the environment is central to robot navigation, planning, and interaction with objects in a scene. Most existing approaches that integrate semantic concepts with 3D maps largely remain confined to the closed-set setting: they can only reason about a finite set of concepts, pre-defined at training time. Further, these maps can only be queried using class labels, or in recent work, using text prompts. We address both these issues with ConceptFusion, a scene representation that is (1) fundamentally open-set, enabling reasoning beyond a closed set of concepts and (ii) inherently multimodal, enabling a diverse range of possible queries to the 3D map, from language, to images, to audio, to 3D geometry, all working in concert. ConceptFusion leverages the open-set capabilities of today's foundation models pre-trained on internet-scale data to reason about concepts across modalities such as natural language, images, and audio. We demonstrate that pixel-aligned open-set features can be fused into 3D maps via traditional SLAM and multi-view fusion approaches. This enables effective zero-shot spatial reasoning, not needing any additional training or finetuning, and retains long-tailed concepts better than supervised approaches, outperforming them by more than 40% margin on 3D IoU. We extensively evaluate ConceptFusion on a number of real-world datasets, simulated home environments, a real-world tabletop manipulation task, and an autonomous driving platform. We showcase new avenues for blending foundation models with 3D open-set multimodal mapping. For more information, visit our project page https://concept-fusion.github.io or watch our 5-minute explainer video https://www.youtube.com/watch?v=rkXgws8fiDs
['Antonio Torralba', 'Florian Shkurti', 'Liam Paull', 'Madhava Krishna', 'Celso Miguel de Melo', 'Joshua B. Tenenbaum', 'Ayush Tewari', 'Nikhil Keetha', 'Soroush Saryazdi', 'Ganesh Iyer', 'Shuang Li', 'Tao Chen', 'Mohd Omama', 'Qiao Gu', 'Alihusein Kuwajerwala', 'Krishna Murthy Jatavallabhula']
2023-02-14
null
null
null
null
['robot-navigation']
['robots']
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[4.764964580535889, 0.315258264541626]
ec259496-c797-48e4-b8a4-677ae49e92eb
wear-a-multimodal-dataset-for-wearable-and
2304.05088
null
https://arxiv.org/abs/2304.05088v2
https://arxiv.org/pdf/2304.05088v2.pdf
WEAR: An Outdoor Sports Dataset for Wearable and Egocentric Activity Recognition
Though research has shown the complementarity of camera- and inertial-based data, datasets which offer both modalities remain scarce. In this paper, we introduce WEAR, an outdoor sports dataset for both vision- and inertial-based human activity recognition (HAR). The dataset comprises data from 18 participants performing a total of 18 different workout activities with untrimmed inertial (acceleration) and camera (egocentric video) data recorded at 10 different outside locations. Unlike previous egocentric datasets, WEAR provides a challenging prediction scenario marked by purposely introduced activity variations as well as an overall small information overlap across modalities. Provided benchmark results reveal that single-modality architectures each have different strengths and weaknesses in their prediction performance. Further, in light of the recent success of transformer-based temporal action localization models, we demonstrate their versatility by applying them in a plain fashion using vision, inertial and combined (vision + inertial) features as input. Results demonstrate both the applicability of vision-based transformers for inertial data and fusing both modalities by means of simple concatenation, with the combined approach (vision + inertial features) being able to produce the highest mean average precision and close-to-best F1-score. The dataset and code to reproduce experiments is publicly available via: https://mariusbock.github.io/wear/
['Hilde Kuehne', 'Kristof Van Laerhoven', 'Michael Moeller', 'Marius Bock']
2023-04-11
null
null
null
null
['egocentric-activity-recognition', 'action-localization', 'human-activity-recognition', 'wearable-activity-recognition', 'human-activity-recognition']
['computer-vision', 'computer-vision', 'computer-vision', 'time-series', 'time-series']
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[7.7265825271606445, 0.5440412759780884]
6ac668c3-095e-47c0-81d4-a7bf4f740556
occlusion-aware-video-object-inpainting
2108.06765
null
https://arxiv.org/abs/2108.06765v1
https://arxiv.org/pdf/2108.06765v1.pdf
Occlusion-Aware Video Object Inpainting
Conventional video inpainting is neither object-oriented nor occlusion-aware, making it liable to obvious artifacts when large occluded object regions are inpainted. This paper presents occlusion-aware video object inpainting, which recovers both the complete shape and appearance for occluded objects in videos given their visible mask segmentation. To facilitate this new research, we construct the first large-scale video object inpainting benchmark YouTube-VOI to provide realistic occlusion scenarios with both occluded and visible object masks available. Our technical contribution VOIN jointly performs video object shape completion and occluded texture generation. In particular, the shape completion module models long-range object coherence while the flow completion module recovers accurate flow with sharp motion boundary, for propagating temporally-consistent texture to the same moving object across frames. For more realistic results, VOIN is optimized using both T-PatchGAN and a new spatio-temporal attention-based multi-class discriminator. Finally, we compare VOIN and strong baselines on YouTube-VOI. Experimental results clearly demonstrate the efficacy of our method including inpainting complex and dynamic objects. VOIN degrades gracefully with inaccurate input visible mask.
['Chi-Keung Tang', 'Yu-Wing Tai', 'Lei Ke']
2021-08-15
null
http://openaccess.thecvf.com//content/ICCV2021/html/Ke_Occlusion-Aware_Video_Object_Inpainting_ICCV_2021_paper.html
http://openaccess.thecvf.com//content/ICCV2021/papers/Ke_Occlusion-Aware_Video_Object_Inpainting_ICCV_2021_paper.pdf
iccv-2021-1
['texture-synthesis', 'video-inpainting']
['computer-vision', 'computer-vision']
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[10.801901817321777, -1.3492519855499268]
80b03680-7136-4dcf-a854-a002f565a28c
a-unified-technique-for-entropy-enhancement
null
null
https://www.sciencedirect.com/science/article/pii/S0010482522002165?dgcid=author
https://www.sciencedirect.com/science/article/pii/S0010482522002165?dgcid=author
A Unified Technique for Entropy Enhancement Based Diabetic Retinopathy Detection Using Hybrid Neural Network
In this paper, a unified technique for entropy enhancement-based diabetic retinopathy detection using a hybrid neural network is proposed for diagnosing diabetic retinopathy. Medical images play crucial roles in the diagnosis, but two images representing two different stages of a disease look alike. It, consequently, make the process of diagnosis extraneous and error-prone. Therefore, in this paper, a technique is proposed to address these issues. Firstly, a novel entropy enhancement technique is devised exploiting the discrete wavelet transforms to improve the visibility of the medical images by making the subtle features more prominent. Later, we designed a computationally efficient hybrid neural network that efficiently classifies diabetic retinopathy images. To examine the effectiveness of our technique, we have chosen three datasets: Ultra-Wide Filed (UWF) dataset, Asia Pacific Tele Ophthalmology Society (APTOS) dataset, and MESSIDOR-2 dataset. In the end, we performed extensive experiments to validate the performance of our technique. In addition, the comparison of the proposed scheme – in terms of accuracy, specificity, sensitivity, precision and recall curve, and area under the curve – with some of the best contemporary schemes shows the significant improvement of our techniques in terms of diabetic retinopathy classification.
['R. Noor', 'M. Arif', 'A. Ullah', 'M. Imran', 'Fatima']
2020-07-01
null
null
null
journal-2020-7
['diabetic-retinopathy-detection']
['medical']
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[15.817502975463867, -3.946977138519287]
46a68eb8-5e02-4c5d-864a-74b9bea77ac7
end-to-end-multi-modal-multi-task-vehicle
1801.06734
null
http://arxiv.org/abs/1801.06734v2
http://arxiv.org/pdf/1801.06734v2.pdf
End-to-end Multi-Modal Multi-Task Vehicle Control for Self-Driving Cars with Visual Perception
Convolutional Neural Networks (CNN) have been successfully applied to autonomous driving tasks, many in an end-to-end manner. Previous end-to-end steering control methods take an image or an image sequence as the input and directly predict the steering angle with CNN. Although single task learning on steering angles has reported good performances, the steering angle alone is not sufficient for vehicle control. In this work, we propose a multi-task learning framework to predict the steering angle and speed control simultaneously in an end-to-end manner. Since it is nontrivial to predict accurate speed values with only visual inputs, we first propose a network to predict discrete speed commands and steering angles with image sequences. Moreover, we propose a multi-modal multi-task network to predict speed values and steering angles by taking previous feedback speeds and visual recordings as inputs. Experiments are conducted on the public Udacity dataset and a newly collected SAIC dataset. Results show that the proposed model predicts steering angles and speed values accurately. Furthermore, we improve the failure data synthesis methods to solve the problem of error accumulation in real road tests.
['Jiebo Luo', 'Jerry Yu', 'Yixuan Zhang', 'Zhengyuan Yang', 'Junjie Cai']
2018-01-20
null
null
null
null
['steering-control']
['computer-vision']
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[8.04005241394043, -1.39430832862854]
a7eb7330-55ef-47d0-bcc9-fa2d6e3b4d9e
m-2-3dlanenet-multi-modal-3d-lane-detection
2209.05996
null
https://arxiv.org/abs/2209.05996v2
https://arxiv.org/pdf/2209.05996v2.pdf
M^2-3DLaneNet: Multi-Modal 3D Lane Detection
Estimating accurate lane lines in 3D space remains challenging due to their sparse and slim nature. In this work, we propose the M^2-3DLaneNet, a Multi-Modal framework for effective 3D lane detection. Aiming at integrating complementary information from multi-sensors, M^2-3DLaneNet first extracts multi-modal features with modal-specific backbones, then fuses them in a unified Bird's-Eye View (BEV) space. Specifically, our method consists of two core components. 1) To achieve accurate 2D-3D mapping, we propose the top-down BEV generation. Within it, a Line-Restricted Deform-Attention (LRDA) module is utilized to effectively enhance image features in a top-down manner, fully capturing the slenderness features of lanes. After that, it casts the 2D pyramidal features into 3D space using depth-aware lifting and generates BEV features through pillarization. 2) We further propose the bottom-up BEV fusion, which aggregates multi-modal features through multi-scale cascaded attention, integrating complementary information from camera and LiDAR sensors. Sufficient experiments demonstrate the effectiveness of M^2-3DLaneNet, which outperforms previous state-of-the-art methods by a large margin, i.e., 12.1% F1-score improvement on OpenLane dataset.
['Zhen Li', 'Shuguang Cui', 'Tang Kun', 'Shuqi Mei', 'Chao Zheng', 'Chaoda Zheng', 'Xu Yan', 'Yueru Luo']
2022-09-13
null
null
null
null
['3d-lane-detection', 'lane-detection']
['computer-vision', 'computer-vision']
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[8.03225326538086, -1.8401490449905396]
a466c063-01c0-414c-8192-797858cd5e4d
baller2vec-a-look-ahead-multi-entity
2104.11980
null
https://arxiv.org/abs/2104.11980v2
https://arxiv.org/pdf/2104.11980v2.pdf
baller2vec++: A Look-Ahead Multi-Entity Transformer For Modeling Coordinated Agents
In many multi-agent spatiotemporal systems, agents operate under the influence of shared, unobserved variables (e.g., the play a team is executing in a game of basketball). As a result, the trajectories of the agents are often statistically dependent at any given time step; however, almost universally, multi-agent models implicitly assume the agents' trajectories are statistically independent at each time step. In this paper, we introduce baller2vec++, a multi-entity Transformer that can effectively model coordinated agents. Specifically, baller2vec++ applies a specially designed self-attention mask to a mixture of location and "look-ahead" trajectory sequences to learn the distributions of statistically dependent agent trajectories. We show that, unlike baller2vec (baller2vec++'s predecessor), baller2vec++ can learn to emulate the behavior of perfectly coordinated agents in a simulated toy dataset. Additionally, when modeling the trajectories of professional basketball players, baller2vec++ outperforms baller2vec by a wide margin.
['Anh Nguyen', 'Michael A. Alcorn']
2021-04-24
null
https://openreview.net/forum?id=p2XgjS3Qp4X
https://openreview.net/pdf?id=p2XgjS3Qp4X
neurips-2021-12
['trajectory-modeling']
['time-series']
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[5.853166103363037, 0.7291544675827026]
3760f5a4-c513-454f-8f0e-aa8d2b83ae31
lanesnns-spiking-neural-networks-for-lane
2208.02253
null
https://arxiv.org/abs/2208.02253v1
https://arxiv.org/pdf/2208.02253v1.pdf
LaneSNNs: Spiking Neural Networks for Lane Detection on the Loihi Neuromorphic Processor
Autonomous Driving (AD) related features represent important elements for the next generation of mobile robots and autonomous vehicles focused on increasingly intelligent, autonomous, and interconnected systems. The applications involving the use of these features must provide, by definition, real-time decisions, and this property is key to avoid catastrophic accidents. Moreover, all the decision processes must require low power consumption, to increase the lifetime and autonomy of battery-driven systems. These challenges can be addressed through efficient implementations of Spiking Neural Networks (SNNs) on Neuromorphic Chips and the use of event-based cameras instead of traditional frame-based cameras. In this paper, we present a new SNN-based approach, called LaneSNN, for detecting the lanes marked on the streets using the event-based camera input. We develop four novel SNN models characterized by low complexity and fast response, and train them using an offline supervised learning rule. Afterward, we implement and map the learned SNNs models onto the Intel Loihi Neuromorphic Research Chip. For the loss function, we develop a novel method based on the linear composition of Weighted binary Cross Entropy (WCE) and Mean Squared Error (MSE) measures. Our experimental results show a maximum Intersection over Union (IoU) measure of about 0.62 and very low power consumption of about 1 W. The best IoU is achieved with an SNN implementation that occupies only 36 neurocores on the Loihi processor while providing a low latency of less than 8 ms to recognize an image, thereby enabling real-time performance. The IoU measures provided by our networks are comparable with the state-of-the-art, but at a much low power consumption of 1 W.
['Muhammad Shafique', 'Guido Masera', 'Maurizio Martina', 'Alberto Marchisio', 'Alberto Viale']
2022-08-03
null
null
null
null
['lane-detection']
['computer-vision']
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[8.19087028503418, 2.4010822772979736]
87f7eea6-e073-4832-9a7f-7e198e4626cc
a-model-based-active-testing-approach-to
1401.3850
null
http://arxiv.org/abs/1401.3850v1
http://arxiv.org/pdf/1401.3850v1.pdf
A Model-Based Active Testing Approach to Sequential Diagnosis
Model-based diagnostic reasoning often leads to a large number of diagnostic hypotheses. The set of diagnoses can be reduced by taking into account extra observations (passive monitoring), measuring additional variables (probing) or executing additional tests (sequential diagnosis/test sequencing). In this paper we combine the above approaches with techniques from Automated Test Pattern Generation (ATPG) and Model-Based Diagnosis (MBD) into a framework called FRACTAL (FRamework for ACtive Testing ALgorithms). Apart from the inputs and outputs that connect a system to its environment, in active testing we consider additional input variables to which a sequence of test vectors can be supplied. We address the computationally hard problem of computing optimal control assignments (as defined in FRACTAL) in terms of a greedy approximation algorithm called FRACTAL-G. We compare the decrease in the number of remaining minimal cardinality diagnoses of FRACTAL-G to that of two more FRACTAL algorithms: FRACTAL-ATPG and FRACTAL-P. FRACTAL-ATPG is based on ATPG and sequential diagnosis while FRACTAL-P is based on probing and, although not an active testing algorithm, provides a baseline for comparing the lower bound on the number of reachable diagnoses for the FRACTAL algorithms. We empirically evaluate the trade-offs of the three FRACTAL algorithms by performing extensive experimentation on the ISCAS85/74XXX benchmark of combinational circuits.
['Alexander Feldman', 'Arjan van Gemund', 'Gregory Provan']
2014-01-16
null
null
null
null
['sequential-diagnosis']
['medical']
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[5.389865875244141, 2.7074971199035645]
d00cd722-c8c7-4d4f-bf31-a200d7c22c3c
real-time-covid-19-diagnosis-from-x-ray
2106.01435
null
https://arxiv.org/abs/2106.01435v1
https://arxiv.org/pdf/2106.01435v1.pdf
Real-Time COVID-19 Diagnosis from X-Ray Images Using Deep CNN and Extreme Learning Machines Stabilized by Chimp Optimization Algorithm
Real-time detection of COVID-19 using radiological images has gained priority due to the increasing demand for fast diagnosis of COVID-19 cases. This paper introduces a novel two-phase approach for classifying chest X-ray images. Deep Learning (DL) methods fail to cover these aspects since training and fine-tuning the model's parameters consume much time. In this approach, the first phase comes to train a deep CNN working as a feature extractor, and the second phase comes to use Extreme Learning Machines (ELMs) for real-time detection. The main drawback of ELMs is to meet the need of a large number of hidden-layer nodes to gain a reliable and accurate detector in applying image processing since the detective performance remarkably depends on the setting of initial weights and biases. Therefore, this paper uses Chimp Optimization Algorithm (ChOA) to improve results and increase the reliability of the network while maintaining real-time capability. The designed detector is to be benchmarked on the COVID-Xray-5k and COVIDetectioNet datasets, and the results are verified by comparing it with the classic DCNN, Genetic Algorithm optimized ELM (GA-ELM), Cuckoo Search optimized ELM (CS-ELM), and Whale Optimization Algorithm optimized ELM (WOA-ELM). The proposed approach outperforms other comparative benchmarks with 98.25% and 99.11% as ultimate accuracy on the COVID-Xray-5k and COVIDetectioNet datasets, respectively, and it led relative error to reduce as the amount of 1.75% and 1.01% as compared to a convolutional CNN. More importantly, the time needed for training deep ChOA-ELM is only 0.9474 milliseconds, and the overall testing time for 3100 images is 2.937 seconds.
['Tarik A. Rashid', 'Sarkhel H. Taher Karim', 'Gholam-Reza Parvizi', 'Mokhtar Mohammadi', 'Mohammad Khishe', 'Hu Tianqing']
2021-05-14
null
null
null
null
['covid-19-detection']
['medical']
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[14.951973915100098, -2.518519639968872]
02cc0d32-49a6-4b98-8e47-1971e0f35a12
a-fast-and-accurate-physics-informed-neural
2009.11990
null
https://arxiv.org/abs/2009.11990v2
https://arxiv.org/pdf/2009.11990v2.pdf
A fast and accurate physics-informed neural network reduced order model with shallow masked autoencoder
Traditional linear subspace reduced order models (LS-ROMs) are able to accelerate physical simulations, in which the intrinsic solution space falls into a subspace with a small dimension, i.e., the solution space has a small Kolmogorov n-width. However, for physical phenomena not of this type, e.g., any advection-dominated flow phenomena, such as in traffic flow, atmospheric flows, and air flow over vehicles, a low-dimensional linear subspace poorly approximates the solution. To address cases such as these, we have developed a fast and accurate physics-informed neural network ROM, namely nonlinear manifold ROM (NM-ROM), which can better approximate high-fidelity model solutions with a smaller latent space dimension than the LS-ROMs. Our method takes advantage of the existing numerical methods that are used to solve the corresponding full order models. The efficiency is achieved by developing a hyper-reduction technique in the context of the NM-ROM. Numerical results show that neural networks can learn a more efficient latent space representation on advection-dominated data from 1D and 2D Burgers' equations. A speedup of up to 2.6 for 1D Burgers' and a speedup of 11.7 for 2D Burgers' equations are achieved with an appropriate treatment of the nonlinear terms through a hyper-reduction technique. Finally, a posteriori error bounds for the NM-ROMs are derived that take account of the hyper-reduced operators.
['Youngsoo Choi', 'David Widemann', 'Youngkyu Kim', 'Tarek Zohdi']
2020-09-25
null
null
null
null
['physical-simulations']
['miscellaneous']
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[6.489818572998047, 3.496568202972412]
a49675f8-4a45-4656-8510-5f4b1905979b
tensor-networks-for-multi-modal-non-euclidean
2103.14998
null
https://arxiv.org/abs/2103.14998v1
https://arxiv.org/pdf/2103.14998v1.pdf
Tensor Networks for Multi-Modal Non-Euclidean Data
Modern data sources are typically of large scale and multi-modal natures, and acquired on irregular domains, which poses serious challenges to traditional deep learning models. These issues are partially mitigated by either extending existing deep learning algorithms to irregular domains through graphs, or by employing tensor methods to alleviate the computational bottlenecks imposed by the Curse of Dimensionality. To simultaneously resolve both these issues, we introduce a novel Multi-Graph Tensor Network (MGTN) framework, which leverages on the desirable properties of graphs, tensors and neural networks in a physically meaningful and compact manner. This equips MGTNs with the ability to exploit local information in irregular data sources at a drastically reduced parameter complexity, and over a range of learning paradigms such as regression, classification and reinforcement learning. The benefits of the MGTN framework, especially its ability to avoid overfitting through the inherent low-rank regularization properties of tensor networks, are demonstrated through its superior performance against competing models in the individual tensor, graph, and neural network domains.
['Danilo P. Mandic', 'Kriton Konstantinidis', 'Yao Lei Xu']
2021-03-27
null
null
null
null
['tensor-networks']
['methodology']
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[6.882254600524902, 5.846897602081299]
5acfd885-902f-45ea-b47d-d213bbd217ca
improved-cross-lingual-transfer-learning-for
2306.00789
null
https://arxiv.org/abs/2306.00789v1
https://arxiv.org/pdf/2306.00789v1.pdf
Improved Cross-Lingual Transfer Learning For Automatic Speech Translation
Research in multilingual speech-to-text translation is topical. Having a single model that supports multiple translation tasks is desirable. The goal of this work it to improve cross-lingual transfer learning in multilingual speech-to-text translation via semantic knowledge distillation. We show that by initializing the encoder of the encoder-decoder sequence-to-sequence translation model with SAMU-XLS-R, a multilingual speech transformer encoder trained using multi-modal (speech-text) semantic knowledge distillation, we achieve significantly better cross-lingual task knowledge transfer than the baseline XLS-R, a multilingual speech transformer encoder trained via self-supervised learning. We demonstrate the effectiveness of our approach on two popular datasets, namely, CoVoST-2 and Europarl. On the 21 translation tasks of the CoVoST-2 benchmark, we achieve an average improvement of 12.8 BLEU points over the baselines. In the zero-shot translation scenario, we achieve an average gain of 18.8 and 11.9 average BLEU points on unseen medium and low-resource languages. We make similar observations on Europarl speech translation benchmark.
['James Glass', 'Victoria Mingote', 'Pablo Gimeno', 'Luis Vicente', 'Antoine Laurent', 'Nauman Dawalatabad', 'Sameer Khurana']
2023-06-01
null
null
null
null
['speech-to-text-translation', 'cross-lingual-transfer']
['natural-language-processing', 'natural-language-processing']
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[14.438764572143555, 7.291724681854248]
7a5dcde4-62a5-45b6-ae52-ca4a7aca34d5
slide-single-image-3d-photography-with-soft
2109.01068
null
https://arxiv.org/abs/2109.01068v1
https://arxiv.org/pdf/2109.01068v1.pdf
SLIDE: Single Image 3D Photography with Soft Layering and Depth-aware Inpainting
Single image 3D photography enables viewers to view a still image from novel viewpoints. Recent approaches combine monocular depth networks with inpainting networks to achieve compelling results. A drawback of these techniques is the use of hard depth layering, making them unable to model intricate appearance details such as thin hair-like structures. We present SLIDE, a modular and unified system for single image 3D photography that uses a simple yet effective soft layering strategy to better preserve appearance details in novel views. In addition, we propose a novel depth-aware training strategy for our inpainting module, better suited for the 3D photography task. The resulting SLIDE approach is modular, enabling the use of other components such as segmentation and matting for improved layering. At the same time, SLIDE uses an efficient layered depth formulation that only requires a single forward pass through the component networks to produce high quality 3D photos. Extensive experimental analysis on three view-synthesis datasets, in combination with user studies on in-the-wild image collections, demonstrate superior performance of our technique in comparison to existing strong baselines while being conceptually much simpler. Project page: https://varunjampani.github.io/slide
['Ce Liu', 'Brian Curless', 'David Salesin', 'William T. Freeman', 'Dominik Kaeser', 'Michael Krainin', 'Richard Tucker', 'Abhishek Kar', 'Kyle Sargent', 'Huiwen Chang', 'Varun Jampani']
2021-09-02
null
http://openaccess.thecvf.com//content/ICCV2021/html/Jampani_SLIDE_Single_Image_3D_Photography_With_Soft_Layering_and_Depth-Aware_ICCV_2021_paper.html
http://openaccess.thecvf.com//content/ICCV2021/papers/Jampani_SLIDE_Single_Image_3D_Photography_With_Soft_Layering_and_Depth-Aware_ICCV_2021_paper.pdf
iccv-2021-1
['image-matting']
['computer-vision']
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[9.260276794433594, -3.0565261840820312]
10cd6d92-3b06-4c9d-b07d-aeebb42c63f8
almost-no-label-no-cry
null
null
http://papers.nips.cc/paper/5453-almost-no-label-no-cry
http://papers.nips.cc/paper/5453-almost-no-label-no-cry.pdf
(Almost) No Label No Cry
In Learning with Label Proportions (LLP), the objective is to learn a supervised classifier when, instead of labels, only label proportions for bags of observations are known. This setting has broad practical relevance, in particular for privacy preserving data processing. We first show that the mean operator, a statistic which aggregates all labels, is minimally sufficient for the minimization of many proper scoring losses with linear (or kernelized) classifiers without using labels. We provide a fast learning algorithm that estimates the mean operator via a manifold regularizer with guaranteed approximation bounds. Then, we present an iterative learning algorithm that uses this as initialization. We ground this algorithm in Rademacher-style generalization bounds that fit the LLP setting, introducing a generalization of Rademacher complexity and a Label Proportion Complexity measure. This latter algorithm optimizes tractable bounds for the corresponding bag-empirical risk. Experiments are provided on fourteen domains, whose size ranges up to 300K observations. They display that our algorithms are scalable and tend to consistently outperform the state of the art in LLP. Moreover, in many cases, our algorithms compete with or are just percents of AUC away from the Oracle that learns knowing all labels. On the largest domains, half a dozen proportions can suffice, i.e. roughly 40K times less than the total number of labels.
['Giorgio Patrini', 'Tiberio Caetano', 'Paul Rivera', 'Richard Nock']
2014-12-01
null
null
null
neurips-2014-12
['style-generalization']
['computer-vision']
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[8.293940544128418, 4.240356922149658]
d678feb0-36fc-41c8-8a47-bcf31f0ef798
solitary-pulmonary-nodules-prediction-for
2305.10466
null
https://arxiv.org/abs/2305.10466v1
https://arxiv.org/pdf/2305.10466v1.pdf
Solitary pulmonary nodules prediction for lung cancer patients using nomogram and machine learning
Lung cancer(LC) is a type of malignant neoplasm that originates in the bronchial mucosa or glands.As a clinically common nodule,solitary pulmonary nodules(SPNs) have a significantly higher probability of malignancy when they are larger than 8 mm in diameter.But there is also a risk of lung cancer when the diameter is less than 8mm,the purpose of this study was to create a nomogram for estimating the likelihood of lung cancer in patients with SPNs of 8 mm or smaller using computed tomography(CT) scans and biomarker information.Use CT scans and various biomarkers as input to build predictive models for the likelihood of lung cancer in patients with SPNs of 8 mm or less.The age,precursor gastrin-releasing peptide (ProGRP),gender,Carcinoembryonic Antigen(CEA),and stress corrosion cracking(SCC) were independent key tumor markers and were entered into the nomogram.The developed nomogram demonstrated strong accuracy in predicting lung cancer risk,with an internal validation area under the receiver operating characteristics curve(ROC) of 0.8474.The calibration curves plotted showed that the nomogram predicted the probability of lung cancer with good agreement with the actual probability.In this study,we finally succeeded in constructing a suitable nomogram that could predict the risk of lung cancer in patients with SPNs<=8 mm in diameter.The model has a high level of accuracy and is able to accurately distinguish between different patients,allowing clinicians to develop personalized treatment plans for individuals with SPNs.
['Gongjin Song', 'Hailan Zhang']
2023-05-17
null
null
null
null
['computed-tomography-ct']
['methodology']
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[15.376104354858398, -2.3576602935791016]
3063c7d4-6a65-4bf9-a3f4-979ad7a4f307
leaps-end-to-end-one-step-person-search-with
2303.11859
null
https://arxiv.org/abs/2303.11859v1
https://arxiv.org/pdf/2303.11859v1.pdf
LEAPS: End-to-End One-Step Person Search With Learnable Proposals
We propose an end-to-end one-step person search approach with learnable proposals, named LEAPS. Given a set of sparse and learnable proposals, LEAPS employs a dynamic person search head to directly perform person detection and corresponding re-id feature generation without non-maximum suppression post-processing. The dynamic person search head comprises a detection head and a novel flexible re-id head. Our flexible re-id head first employs a dynamic region-of-interest (RoI) operation to extract discriminative RoI features of the proposals. Then, it generates re-id features using a plain and a hierarchical interaction re-id module. To better guide discriminative re-id feature learning, we introduce a diverse re-id sample matching strategy, instead of bipartite matching in detection head. Comprehensive experiments reveal the benefit of the proposed LEAPS, achieving a favorable performance on two public person search benchmarks: CUHK-SYSU and PRW. When using the same ResNet50 backbone, our LEAPS obtains a mAP score of 55.0%, outperforming the best reported results in literature by 1.7%, while achieving around a two-fold speedup on the challenging PRW dataset. Our source code and models will be released.
['Yanwei Pang', 'Fahad Khan', 'Jin Xie', 'Rao Muhammad Anwer', 'Jiale Cao', 'Zhiqiang Dong']
2023-03-21
null
null
null
null
['person-search', 'human-detection']
['computer-vision', 'computer-vision']
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[14.871386528015137, 0.7978830337524414]
d461097a-6776-42e9-8b9b-38a56b46f6fd
casa-nlu-context-aware-self-attentive-natural
1909.08705
null
https://arxiv.org/abs/1909.08705v1
https://arxiv.org/pdf/1909.08705v1.pdf
CASA-NLU: Context-Aware Self-Attentive Natural Language Understanding for Task-Oriented Chatbots
Natural Language Understanding (NLU) is a core component of dialog systems. It typically involves two tasks - intent classification (IC) and slot labeling (SL), which are then followed by a dialogue management (DM) component. Such NLU systems cater to utterances in isolation, thus pushing the problem of context management to DM. However, contextual information is critical to the correct prediction of intents and slots in a conversation. Prior work on contextual NLU has been limited in terms of the types of contextual signals used and the understanding of their impact on the model. In this work, we propose a context-aware self-attentive NLU (CASA-NLU) model that uses multiple signals, such as previous intents, slots, dialog acts and utterances over a variable context window, in addition to the current user utterance. CASA-NLU outperforms a recurrent contextual NLU baseline on two conversational datasets, yielding a gain of up to 7% on the IC task for one of the datasets. Moreover, a non-contextual variant of CASA-NLU achieves state-of-the-art performance for IC task on standard public datasets - Snips and ATIS.
['Mona Diab', 'Garima Lalwani', 'Peng Zhang', 'Arshit Gupta']
2019-09-18
casa-nlu-context-aware-self-attentive-natural-1
https://aclanthology.org/D19-1127
https://aclanthology.org/D19-1127.pdf
ijcnlp-2019-11
['dialogue-management']
['natural-language-processing']
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[12.707925796508789, 7.745953559875488]
cfa95833-c870-4b79-ac9e-dc1fc29bf0d3
self-supervised-multi-task-procedure-learning
null
null
https://www.ecva.net/papers/eccv_2020/papers_ECCV/html/2830_ECCV_2020_paper.php
https://www.ecva.net/papers/eccv_2020/papers_ECCV/papers/123620545.pdf
Self-Supervised Multi-Task Procedure Learning from Instructional Videos
We address the problem of unsupervised procedure learning from instructional videos of multiple tasks using Deep Neural Networks (DNNs). Unlike existing works, we assume that training videos come from multiple tasks without key-step annotations or grammars, and the goals are to classify a test video to the underlying task and to localize its key-steps. Our DNN learns task-dependent attention features from informative regions of each frame without ground-truth bounding boxes and learns to discover and localize key-steps without key-step annotations by using an unsupervised subset selection module as a teacher. It also learns to classify an input video using the discovered key-steps using a learnable key-step feature pooling mechanism that extracts and learns to combine key-step based features for task recognition. By experiments on two instructional video datasets, we show the effectiveness of our method for unsupervised localization of procedure steps and video classification.
['Ehsan Elhamifar', 'Dat Huynh']
null
null
null
null
eccv-2020-8
['procedure-learning']
['computer-vision']
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[8.714776039123535, 0.7132071256637573]
2c6e50e1-398e-468d-9064-f25fe3612607
two-branch-multi-scale-deep-neural-network
2211.16786
null
https://arxiv.org/abs/2211.16786v1
https://arxiv.org/pdf/2211.16786v1.pdf
Two-branch Multi-scale Deep Neural Network for Generalized Document Recapture Attack Detection
The image recapture attack is an effective image manipulation method to erase certain forensic traces, and when targeting on personal document images, it poses a great threat to the security of e-commerce and other web applications. Considering the current learning-based methods suffer from serious overfitting problem, in this paper, we propose a novel two-branch deep neural network by mining better generalized recapture artifacts with a designed frequency filter bank and multi-scale cross-attention fusion module. In the extensive experiment, we show that our method can achieve better generalization capability compared with state-of-the-art techniques on different scenarios.
['Haoliang Li', 'Shiqi Wang', 'Chenqi Kong', 'Jiaxing Li']
2022-11-30
null
null
null
null
['image-manipulation']
['computer-vision']
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[12.392779350280762, 0.986628532409668]
5b5adb8d-afb0-4a15-87a6-2927cc75fe69
micro-stripes-analyses-for-iris-presentation
2010.14850
null
https://arxiv.org/abs/2010.14850v2
https://arxiv.org/pdf/2010.14850v2.pdf
Micro Stripes Analyses for Iris Presentation Attack Detection
Iris recognition systems are vulnerable to the presentation attacks, such as textured contact lenses or printed images. In this paper, we propose a lightweight framework to detect iris presentation attacks by extracting multiple micro-stripes of expanded normalized iris textures. In this procedure, a standard iris segmentation is modified. For our presentation attack detection network to better model the classification problem, the segmented area is processed to provide lower dimensional input segments and a higher number of learning samples. Our proposed Micro Stripes Analyses (MSA) solution samples the segmented areas as individual stripes. Then, the majority vote makes the final classification decision of those micro-stripes. Experiments are demonstrated on five databases, where two databases (IIITD-WVU and Notre Dame) are from the LivDet-2017 Iris competition. An in-depth experimental evaluation of this framework reveals a superior performance compared with state-of-the-art algorithms. Moreover, our solution minimizes the confusion between textured (attack) and soft (bona fide) contact lens presentations.
['Arjan Kuijper', 'Florian Kirchbuchner', 'Naser Damer', 'Meiling Fang']
2020-10-28
null
null
null
null
['iris-segmentation']
['medical']
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[3.7397847175598145, -3.634079933166504]
a54ce186-e0ec-4710-964d-9387022b7a85
ranking-based-siamese-visual-tracking
2205.11761
null
https://arxiv.org/abs/2205.11761v1
https://arxiv.org/pdf/2205.11761v1.pdf
Ranking-Based Siamese Visual Tracking
Current Siamese-based trackers mainly formulate the visual tracking into two independent subtasks, including classification and localization. They learn the classification subnetwork by processing each sample separately and neglect the relationship among positive and negative samples. Moreover, such tracking paradigm takes only the classification confidence of proposals for the final prediction, which may yield the misalignment between classification and localization. To resolve these issues, this paper proposes a ranking-based optimization algorithm to explore the relationship among different proposals. To this end, we introduce two ranking losses, including the classification one and the IoU-guided one, as optimization constraints. The classification ranking loss can ensure that positive samples rank higher than hard negative ones, i.e., distractors, so that the trackers can select the foreground samples successfully without being fooled by the distractors. The IoU-guided ranking loss aims to align classification confidence scores with the Intersection over Union(IoU) of the corresponding localization prediction for positive samples, enabling the well-localized prediction to be represented by high classification confidence. Specifically, the proposed two ranking losses are compatible with most Siamese trackers and incur no additional computation for inference. Extensive experiments on seven tracking benchmarks, including OTB100, UAV123, TC128, VOT2016, NFS30, GOT-10k and LaSOT, demonstrate the effectiveness of the proposed ranking-based optimization algorithm. The code and raw results are available at https://github.com/sansanfree/RBO.
['Qiang Ling', 'Feng Tang']
2022-05-24
null
http://openaccess.thecvf.com//content/CVPR2022/html/Tang_Ranking-Based_Siamese_Visual_Tracking_CVPR_2022_paper.html
http://openaccess.thecvf.com//content/CVPR2022/papers/Tang_Ranking-Based_Siamese_Visual_Tracking_CVPR_2022_paper.pdf
cvpr-2022-1
['visual-tracking']
['computer-vision']
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[6.317736625671387, -2.134039878845215]
881b0e0f-3d6c-4801-b7f1-16e62d4c2d95
unsupervised-video-object-segmentation-with-2
null
null
https://www.ecva.net/papers/eccv_2020/papers_ECCV/html/2189_ECCV_2020_paper.php
https://www.ecva.net/papers/eccv_2020/papers_ECCV/papers/123590477.pdf
Unsupervised Video Object Segmentation with Joint Hotspot Tracking
Object tracking is a well-studied problem in computer vision while identifying salient spots of objects in a video is a less explored direction in the literature. Video eye gaze estimation methods aim to tackle a related task but salient spots in those methods are not bounded by objects and tend to produce very scattered, unstable predictions due to the noisy ground truth data. We reformulate the problem of detecting and tracking of salient object spots as a new task called object hotspot tracking. In this paper, we propose to tackle this task jointly with unsupervised video object segmentation, in real-time, with a unified framework to exploit the synergy between the two. Specifically, we propose a Weighted Correlation Siamese Network (WCS-Net) which employs a Weighted Correlation Block (WCB) for encoding the pixel-wise correspondence between a template frame and the search frame. In addition, WCB takes the initial mask / hotspot as guidance to enhance the influence of salient regions for robust tracking. Our system can operate online during inference and jointly produce the object mask and hotspot track-lets at 33 FPS. Experimental results validate the effectiveness of our network design, and show the benefits of jointly solving the hotspot tracking and object segmentation problems. In particular, our method performs favorably against state-of-the-art video eye gaze models in object hotspot tracking, and outperforms existing methods on three benchmark datasets for unsupervised video object segmentation.
['Radomír Měch', 'You He', 'Zhe Lin', 'Jianming Zhang', 'Huchuan Lu', 'Lu Zhang']
null
null
null
null
eccv-2020-8
['unsupervised-video-object-segmentation']
['computer-vision']
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[9.298672676086426, -0.22327828407287598]
ffde47c2-ffd0-4b7a-ae9b-1483912bc78f
split-kalmannet-a-robust-model-based-deep
2210.09636
null
https://arxiv.org/abs/2210.09636v1
https://arxiv.org/pdf/2210.09636v1.pdf
Split-KalmanNet: A Robust Model-Based Deep Learning Approach for SLAM
Simultaneous localization and mapping (SLAM) is a method that constructs a map of an unknown environment and localizes the position of a moving agent on the map simultaneously. Extended Kalman filter (EKF) has been widely adopted as a low complexity solution for online SLAM, which relies on a motion and measurement model of the moving agent. In practice, however, acquiring precise information about these models is very challenging, and the model mismatch effect causes severe performance loss in SLAM. In this paper, inspired by the recently proposed KalmanNet, we present a robust EKF algorithm using the power of deep learning for online SLAM, referred to as Split-KalmanNet. The key idea of Split-KalmanNet is to compute the Kalman gain using the Jacobian matrix of a measurement function and two recurrent neural networks (RNNs). The two RNNs independently learn the covariance matrices for a prior state estimate and the innovation from data. The proposed split structure in the computation of the Kalman gain allows to compensate for state and measurement model mismatch effects independently. Numerical simulation results verify that Split-KalmanNet outperforms the traditional EKF and the state-of-the-art KalmanNet algorithm in various model mismatch scenarios.
['Namyoon Lee', 'Yonina C. Eldar', 'Nir Shlezinger', 'Jeonghun Park', 'Geon Choi']
2022-10-18
null
null
null
null
['simultaneous-localization-and-mapping']
['computer-vision']
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[7.49202823638916, -2.0712409019470215]
4625e940-ac91-404e-b392-4bda34324174
recurrent-convolutional-neural-networks-for-2
null
null
https://www.aaai.org/ocs/index.php/AAAI/AAAI15/paper/download/9745/9552
https://www.aaai.org/ocs/index.php/AAAI/AAAI15/paper/download/9745/9552
Recurrent Convolutional Neural Networks for Text Classification
Text classification is a foundational task in many NLP applications. Traditional text classifiers often rely on many human-designed features, such as dictionaries, knowledge bases and special tree kernels. In contrast to traditional methods, we introduce a recurrent convolutional neural network for text classification without human-designed features. In our model, we apply a recurrent structure to capture contextual information as far as possible when learning word representations, which may introduce considerably less noise compared to traditional window-based neural networks. We also employ a max-pooling layer that automatically judges which words play key roles in text classification to capture the key components in texts. We conduct experiments on four commonly used datasets. The experimental results show that the proposed method outperforms the state-of-the-art methods on several datasets, particularly on document-level datasets.
['Jun Zhao', 'Kang Liu', 'Liheng Xu', 'Siwei Lai']
2015-01-01
null
null
null
proceedings-of-the-twenty-ninth-aaai
['emotion-recognition-in-conversation']
['natural-language-processing']
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[10.705069541931152, 7.670263290405273]
c155334f-a793-4fff-b6ad-475e8fae4f83
belittling-the-source-trustworthiness
1809.00494
null
http://arxiv.org/abs/1809.00494v1
http://arxiv.org/pdf/1809.00494v1.pdf
Belittling the Source: Trustworthiness Indicators to Obfuscate Fake News on the Web
With the growth of the internet, the number of fake-news online has been proliferating every year. The consequences of such phenomena are manifold, ranging from lousy decision-making process to bullying and violence episodes. Therefore, fact-checking algorithms became a valuable asset. To this aim, an important step to detect fake-news is to have access to a credibility score for a given information source. However, most of the widely used Web indicators have either been shut-down to the public (e.g., Google PageRank) or are not free for use (Alexa Rank). Further existing databases are short-manually curated lists of online sources, which do not scale. Finally, most of the research on the topic is theoretical-based or explore confidential data in a restricted simulation environment. In this paper we explore current research, highlight the challenges and propose solutions to tackle the problem of classifying websites into a credibility scale. The proposed model automatically extracts source reputation cues and computes a credibility factor, providing valuable insights which can help in belittling dubious and confirming trustful unknown websites. Experimental results outperform state of the art in the 2-classes and 5-classes setting.
['Jens Lehmann', 'Piyush Chawla', 'Diego Esteves', 'Aniketh Janardhan Reddy']
2018-09-03
belittling-the-source-trustworthiness-1
https://aclanthology.org/W18-5508
https://aclanthology.org/W18-5508.pdf
ws-2018-11
['web-credibility', 'subjectivity-analysis']
['methodology', 'natural-language-processing']
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[8.128194808959961, 10.215356826782227]
79e2e95f-9299-47c6-9261-562056adedcf
representing-focus-in-ltag
null
null
https://aclanthology.org/W12-4609
https://aclanthology.org/W12-4609.pdf
Representing Focus in LTAG
null
['Kata Balogh']
2012-09-01
representing-focus-in-ltag-1
https://aclanthology.org/W12-4609
https://aclanthology.org/W12-4609.pdf
ws-2012-9
['dialogue-management']
['natural-language-processing']
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[-7.336844444274902, 3.683255195617676]
723f9b98-0ce4-494d-bdc9-06cef388eefb
emulating-the-dynamics-of-complex-systems
2306.16335
null
https://arxiv.org/abs/2306.16335v1
https://arxiv.org/pdf/2306.16335v1.pdf
Emulating the dynamics of complex systems using autoregressive models on manifolds (mNARX)
In this study, we propose a novel surrogate modelling approach to efficiently and accurately approximate the response of complex dynamical systems driven by time-varying exogenous excitations over extended time periods. Our approach, that we name \emph{manifold nonlinear autoregressive modelling with exogenous input} (mNARX), involves constructing a problem-specific exogenous input manifold that is optimal for constructing autoregressive surrogates. The manifold, which forms the core of mNARX, is constructed incrementally by incorporating the physics of the system, as well as prior expert- and domain- knowledge. Because mNARX decomposes the full problem into a series of smaller sub-problems, each with a lower complexity than the original, it scales well with the complexity of the problem, both in terms of training and evaluation costs of the final surrogate. Furthermore, mNARX synergizes well with traditional dimensionality reduction techniques, making it highly suitable for modelling dynamical systems with high-dimensional exogenous inputs, a class of problems that is typically challenging to solve.Since domain knowledge is particularly abundant in physical systems, such as those found in engineering applications, mNARX is well suited for these applications. We demonstrate that mNARX outperforms traditional autoregressive surrogates in predicting the response of a classical coupled spring-mass system excited by a one-dimensional random excitation. Additionally, we show that mNARX is well suited for emulating very high-dimensional time- and state-dependent systems, even when affected by active controllers, by surrogating the dynamics of a realistic aero-servo-elastic onshore wind turbine simulator. In general, our results demonstrate that mNARX offers promising prospects for modelling complex dynamical systems, in terms of accuracy and efficiency.
['Bruno Sudret', 'Stefano Marelli', 'Styfen Schär']
2023-06-28
null
null
null
null
['dimensionality-reduction']
['methodology']
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[6.479795455932617, 3.454958915710449]
9863cf2a-2db1-4e8a-9ea9-960f927fee3f
self-supervised-learning-for-cardiac-mr-image
1907.02757
null
https://arxiv.org/abs/1907.02757v1
https://arxiv.org/pdf/1907.02757v1.pdf
Self-Supervised Learning for Cardiac MR Image Segmentation by Anatomical Position Prediction
In the recent years, convolutional neural networks have transformed the field of medical image analysis due to their capacity to learn discriminative image features for a variety of classification and regression tasks. However, successfully learning these features requires a large amount of manually annotated data, which is expensive to acquire and limited by the available resources of expert image analysts. Therefore, unsupervised, weakly-supervised and self-supervised feature learning techniques receive a lot of attention, which aim to utilise the vast amount of available data, while at the same time avoid or substantially reduce the effort of manual annotation. In this paper, we propose a novel way for training a cardiac MR image segmentation network, in which features are learnt in a self-supervised manner by predicting anatomical positions. The anatomical positions serve as a supervisory signal and do not require extra manual annotation. We demonstrate that this seemingly simple task provides a strong signal for feature learning and with self-supervised learning, we achieve a high segmentation accuracy that is better than or comparable to a U-net trained from scratch, especially at a small data setting. When only five annotated subjects are available, the proposed method improves the mean Dice metric from 0.811 to 0.852 for short-axis image segmentation, compared to the baseline U-net.
['Florian Guitton', 'Giacomo Tarroni', 'Yike Guo', 'Wenjia Bai', 'Steffen E. Petersen', 'Jinming Duan', 'Daniel Rueckert', 'Chen Chen', 'Paul M. Matthews']
2019-07-05
null
null
null
null
['small-data']
['computer-vision']
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[14.714964866638184, -2.2536938190460205]
811e57ba-e8dc-402b-8939-cf493589e4c6
delving-globally-into-texture-and-structure
2209.08217
null
https://arxiv.org/abs/2209.08217v1
https://arxiv.org/pdf/2209.08217v1.pdf
Delving Globally into Texture and Structure for Image Inpainting
Image inpainting has achieved remarkable progress and inspired abundant methods, where the critical bottleneck is identified as how to fulfill the high-frequency structure and low-frequency texture information on the masked regions with semantics. To this end, deep models exhibit powerful superiority to capture them, yet constrained on the local spatial regions. In this paper, we delve globally into texture and structure information to well capture the semantics for image inpainting. As opposed to the existing arts trapped on the independent local patches, the texture information of each patch is reconstructed from all other patches across the whole image, to match the coarsely filled information, specially the structure information over the masked regions. Unlike the current decoder-only transformer within the pixel level for image inpainting, our model adopts the transformer pipeline paired with both encoder and decoder. On one hand, the encoder captures the texture semantic correlations of all patches across image via self-attention module. On the other hand, an adaptive patch vocabulary is dynamically established in the decoder for the filled patches over the masked regions. Building on this, a structure-texture matching attention module anchored on the known regions comes up to marry the best of these two worlds for progressive inpainting via a probabilistic diffusion process. Our model is orthogonal to the fashionable arts, such as Convolutional Neural Networks (CNNs), Attention and Transformer model, from the perspective of texture and structure information for image inpainting. The extensive experiments over the benchmarks validate its superiority. Our code is available at https://github.com/htyjers/DGTS-Inpainting.
['Yong Rui', 'Meng Wang', 'Yang Wang', 'Haipeng Liu']
2022-09-17
null
null
null
null
['image-inpainting']
['computer-vision']
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[11.260812759399414, -1.2752388715744019]
0b95804f-5532-4b04-a169-6fc48d681f28
uav-trajectory-planning-for-data-collection
null
null
https://ieeexplore.ieee.org/document/8842600
https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8842600
UAV Trajectory Planning for Data Collection from Time-Constrained IoT Devices
The global evolution of wireless technologies and intelligent sensing devices are transforming the realization of smart cities. Among the myriad of use cases, there is a need to support applications whereby low-resource IoT devices need to upload their sensor data to a remote control centre by target hard deadlines; otherwise, the data becomes outdated and loses its value, for example, in emergency or industrial control scenarios. In addition, the IoT devices can be either located in remote areas with limited wireless coverage or in dense areas with relatively low quality of service. This motivates the utilization of UAVs to offload traffic from existing wireless networks by collecting data from time-constrained IoT devices with performance guarantees. To this end, we jointly optimize the trajectory of a UAV and the radio resource allocation to maximize the number of served IoT devices, where each device has its own target data upload deadline. The formulated optimization problem is shown to be mixed integer non-convex and generally NP-hard. To solve it, we first propose the high-complexity branch, reduce and bound (BRB) algorithm to find the global optimal solution for relatively small scale scenarios. Then, we develop an effective sub-optimal algorithm based on successive convex approximation in order to obtain results for larger networks. Next, we propose an extension algorithm to further minimize the UAV's flight distance for cases where the initial and final UAV locations are known a priori. We demonstrate the favourable characteristics of the algorithms via extensive simulations and analysis as a function of various system parameters, with benchmarking against two greedy algorithms based on distance and deadline metrics.
['Ali Ghrayeb', 'Tri Minh Nguyen', 'Chadi M. Assi', 'Sanaa Sharafeddine', 'Moataz Samir']
2019-09-17
null
null
null
ieee-transactions-on-wireless-communications-1
['trajectory-planning']
['robots']
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[5.894326686859131, 1.5370090007781982]
f71f8964-9740-4ef0-a13f-a4b27da67811
a-max-affine-spline-perspective-of-recurrent
null
null
https://openreview.net/forum?id=BJej72AqF7
https://openreview.net/pdf?id=BJej72AqF7
A MAX-AFFINE SPLINE PERSPECTIVE OF RECURRENT NEURAL NETWORKS
We develop a framework for understanding and improving recurrent neural net-works (RNNs) using max-affine spline operators (MASO). We prove that RNNs using piecewise affine and convex nonlinearities can be written as a simple piecewise affine spline operator. The resulting representation provides several new perspectives for analyzing RNNs, three of which we study in this paper. First, we show that an RNN internally partitions the input space during training and that it builds up the partition through time. Second, we show that the affine parameter of an RNN corresponds to an input-specific template, from which we can interpret an RNN as performing a simple template matching (matched filtering) given the input. Third, by closely examining the MASO RNN formula, we prove that injecting Gaussian noise in the initial hidden state in RNNs corresponds to an explicit L2 regularization on the affine parameters, which links to exploding gradient issues and improves generalization. Extensive experiments on several datasets of various modalities demonstrate and validate each of the above analyses. In particular, using initial hidden states elevates simple RNNs to state-of-the-art performance on these datasets.
['Richard Baraniuk', 'Zichao Wang', 'Randall Balestriero']
2019-05-01
null
null
null
iclr-2019-5
['l2-regularization']
['methodology']
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