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38,510 | A path following algorithm for the graph matching problem | cs.CV | We propose a convex-concave programming approach for the labeled weighted
graph matching problem. The convex-concave programming formulation is obtained
by rewriting the weighted graph matching problem as a least-square problem on
the set of permutation matrices and relaxing it to two different optimization
problems: a... | computer science |
38,511 | Some Aspects of Testing Process for Transport Streams in Digital Video
Broadcasting | cs.CV | This paper presents some aspects related to the DVB (Digital Video
Broadcasting) investigation. The basic aspects of DVB are presented, with an
emphasis on DVB-T version of standard. The main purpose of this research is to
analyze the way that the transmission of the transport streams is realized in
case of the Terrest... | computer science |
38,512 | Implementing a Test Strategy for an Advanced Video Acquisition and
Processing Architecture | cs.CV | This paper presents some aspects related to test process of an advanced video
system used in remote IP surveillance. The system is based on a Pentium
compatible architecture using the industrial standard PC104+. First the overall
architecture of the system is presented, involving both hardware or software
aspects. The ... | computer science |
38,513 | Fast k Nearest Neighbor Search using GPU | cs.CV | The recent improvements of graphics processing units (GPU) offer to the
computer vision community a powerful processing platform. Indeed, a lot of
highly-parallelizable computer vision problems can be significantly accelerated
using GPU architecture. Among these algorithms, the k nearest neighbor search
(KNN) is a well... | computer science |
38,514 | Technical Report - Automatic Contour Extraction from 2D Neuron Images | cs.CV | This work describes a novel methodology for automatic contour extraction from
2D images of 3D neurons (e.g. camera lucida images and other types of 2D
microscopy). Most contour-based shape analysis methods can not be used to
characterize such cells because of overlaps between neuronal processes. The
proposed framework ... | computer science |
38,515 | Natural pseudo-distance and optimal matching between reduced size
functions | cs.CG | This paper studies the properties of a new lower bound for the natural
pseudo-distance. The natural pseudo-distance is a dissimilarity measure between
shapes, where a shape is viewed as a topological space endowed with a
real-valued continuous function. Measuring dissimilarity amounts to minimizing
the change in the fu... | computer science |
38,516 | The Euler-Poincare theory of Metamorphosis | cs.CV | In the pattern matching approach to imaging science, the process of
``metamorphosis'' is template matching with dynamical templates. Here, we
recast the metamorphosis equations of into the Euler-Poincare variational
framework of and show that the metamorphosis equations contain the equations
for a perfect complex fluid... | computer science |
38,517 | Audio Classification from Time-Frequency Texture | cs.CV | Time-frequency representations of audio signals often resemble texture
images. This paper derives a simple audio classification algorithm based on
treating sound spectrograms as texture images. The algorithm is inspired by an
earlier visual classification scheme particularly efficient at classifying
textures. While sol... | computer science |
38,518 | Faster Retrieval with a Two-Pass Dynamic-Time-Warping Lower Bound | cs.DB | The Dynamic Time Warping (DTW) is a popular similarity measure between time
series. The DTW fails to satisfy the triangle inequality and its computation
requires quadratic time. Hence, to find closest neighbors quickly, we use
bounding techniques. We can avoid most DTW computations with an inexpensive
lower bound (LB K... | computer science |
38,519 | chi2TeX Semi-automatic translation from chiwriter to LaTeX | cs.SE | Semi-automatic translation of math-filled book from obsolete ChiWriter format
to LaTeX. Is it possible? Idea of criterion whether to use automatic or hand
mode for translation. Illustrations. | computer science |
38,520 | Automatic Generation of the Axial Lines of Urban Environments to Capture
What We Perceive | cs.CG | Based on the concepts of isovists and medial axes, we developed a set of
algorithms that can automatically generate axial lines for representing
individual linearly stretched parts of open space of an urban environment. Open
space is the space between buildings, where people can freely move around. The
generation of th... | computer science |
38,521 | Exact Histogram Specification Optimized for Structural Similarity | cs.CV | An exact histogram specification (EHS) method modifies its input image to
have a specified histogram. Applications of EHS include image (contrast)
enhancement (e.g., by histogram equalization) and histogram watermarking.
Performing EHS on an image, however, reduces its visual quality. Starting from
the output of a gene... | computer science |
38,522 | Model-Based Event Detection in Wireless Sensor Networks | cs.NI | In this paper we present an application of techniques from statistical signal
processing to the problem of event detection in wireless sensor networks used
for environmental monitoring. The proposed approach uses the well-established
Principal Component Analysis (PCA) technique to build a compact model of the
observed ... | computer science |
38,523 | Over-enhancement Reduction in Local Histogram Equalization using its
Degrees of Freedom | cs.CV | A well-known issue of local (adaptive) histogram equalization (LHE) is
over-enhancement (i.e., generation of spurious details) in homogenous areas of
the image. In this paper, we show that the LHE problem has many solutions due
to the ambiguity in ranking pixels with the same intensity. The LHE solution
space can be se... | computer science |
38,524 | Better Global Polynomial Approximation for Image Rectification | cs.CV | When using images to locate objects, there is the problem of correcting for
distortion and misalignment in the images. An elegant way of solving this
problem is to generate an error correcting function that maps points in an
image to their corrected locations. We generate such a function by fitting a
polynomial to a se... | computer science |
38,525 | Generalized Kernel-based Visual Tracking | cs.CV | In this work we generalize the plain MS trackers and attempt to overcome
standard mean shift trackers' two limitations.
It is well known that modeling and maintaining a representation of a target
object is an important component of a successful visual tracker.
However, little work has been done on building a robust... | computer science |
38,526 | Semantic Robot Vision Challenge: Current State and Future Directions | cs.CV | The Semantic Robot Vision Competition provided an excellent opportunity for
our research lab to integrate our many ideas under one umbrella, inspiring both
collaboration and new research. The task, visual search for an unknown object,
is relevant to both the vision and robotics communities. Moreover, since the
interpla... | computer science |
38,527 | Non-quadratic convex regularized reconstruction of MR images from spiral
acquisitions | cs.CV | Combining fast MR acquisition sequences and high resolution imaging is a
major issue in dynamic imaging. Reducing the acquisition time can be achieved
by using non-Cartesian and sparse acquisitions. The reconstruction of MR images
from these measurements is generally carried out using gridding that
interpolates the mis... | computer science |
38,528 | Geometric Analysis of the Conformal Camera for Intermediate-Level Vision
and Perisaccadic Perception | cs.CV | A binocular system developed by the author in terms of projective Fourier
transform (PFT) of the conformal camera, which numerically integrates the head,
eyes, and visual cortex, is used to process visual information during saccadic
eye movements. Although we make three saccades per second at the eyeball's
maximum spee... | computer science |
38,529 | Co-occurrence Matrix and Fractal Dimension for Image Segmentation | stat.AP | One of the most important tasks in image processing problem and machine
vision is object recognition, and the success of many proposed methods relies
on a suitable choice of algorithm for the segmentation of an image. This paper
focuses on how to apply texture operators based on the concept of fractal
dimension and coo... | computer science |
38,530 | CanICA: Model-based extraction of reproducible group-level ICA patterns
from fMRI time series | cs.CV | Spatial Independent Component Analysis (ICA) is an increasingly used
data-driven method to analyze functional Magnetic Resonance Imaging (fMRI)
data. To date, it has been used to extract meaningful patterns without prior
information. However, ICA is not robust to mild data variation and remains a
parameter-sensitive al... | computer science |
38,531 | Laser Actuated Presentation System | cs.HC | We present here a pattern sensitive PowerPoint presentation scheme. The
presentation is actuated by simple patterns drawn on the presentation screen by
a laser pointer. A specific pattern corresponds to a particular command
required to operate the presentation. Laser spot on the screen is captured by a
RGB webcam with ... | computer science |
38,532 | Reversible Image Authentication with Tamper Localization Based on
Integer Wavelet Transform | cs.CR | In this paper, a new reversible image authentication technique with tamper
localization based on watermarking in integer wavelet transform is proposed. If
the image authenticity is verified, then the distortion due to embedding the
watermark can be completely removed from the watermarked image. If the image is
tampered... | computer science |
38,533 | Fingerprint Verification based on Gabor Filter Enhancement | cs.CR | Human fingerprints are reliable characteristics for personnel identification
as it is unique and persistence. A fingerprint pattern consists of ridges,
valleys and minutiae. In this paper we propose Fingerprint Verification based
on Gabor Filter Enhancement (FVGFE) algorithm for minutiae feature extraction
and post pro... | computer science |
38,534 | Robust Multi biometric Recognition Using Face and Ear Images | cs.CR | This study investigates the use of ear as a biometric for authentication and
shows experimental results obtained on a newly created dataset of 420 images.
Images are passed to a quality module in order to reduce False Rejection Rate.
The Principal Component Analysis (eigen ear) approach was used, obtaining 90.7
percent... | computer science |
38,535 | Genus Computing for 3D digital objects: algorithm and implementation | cs.CV | This paper deals with computing topological invariants such as connected
components, boundary surface genus, and homology groups. For each input data
set, we have designed or implemented algorithms to calculate connected
components, boundary surfaces and their genus, and homology groups. Due to the
fact that genus calc... | computer science |
38,536 | An Improved DC Recovery Method from AC Coefficients of DCT-Transformed
Images | cs.MM | Motivated by the work of Uehara et al. [1], an improved method to recover DC
coefficients from AC coefficients of DCT-transformed images is investigated in
this work, which finds applications in cryptanalysis of selective multimedia
encryption. The proposed under/over-flow rate minimization (FRM) method employs
an opti... | computer science |
38,537 | The Fast Haar Wavelet Transform for Signal & Image Processing | cs.MM | A method for the design of Fast Haar wavelet for signal processing and image
processing has been proposed. In the proposed work, the analysis bank and
synthesis bank of Haar wavelet is modified by using polyphase structure.
Finally, the Fast Haar wavelet was designed and it satisfies alias free and
perfect reconstructi... | computer science |
38,538 | Assessment Of The Wind Farm Impact On The Radar | cs.CV | This study shows the means to evaluate the wind farm impact on the radar. It
proposes the set of tools, which can be used to realise this objective. The big
part of report covers the study of complex pattern propagation factor as the
critical issue of the Advanced Propagation Model (APM). Finally, the reader can
find h... | computer science |
38,539 | Iterative exact global histogram specification and SSIM gradient ascent:
a proof of convergence, step size and parameter selection | cs.CV | The SSIM-optimized exact global histogram specification (EGHS) is shown to
converge in the sense that the first order approximation of the result's
quality (i.e., its structural similarity with input) does not decrease in an
iteration, when the step size is small. Each iteration is composed of SSIM
gradient ascent and ... | computer science |
38,540 | CLD-shaped Brushstrokes in Non-Photorealistic Rendering | cs.CV | Rendering techniques based on a random grid can be improved by adapting
brushstrokes to the shape of different areas of the original picture. In this
paper, the concept of Coherence Length Diagram is applied to determine the
adaptive brushstrokes, in order to simulate an impressionist painting. Some
examples are provid... | computer science |
38,541 | Object-image correspondence for curves under finite and affine cameras | cs.CV | We provide criteria for deciding whether a given planar curve is an image of
a given spatial curve, obtained by a central or a parallel projection with
unknown parameters. These criteria reduce the projection problem to a certain
modification of the equivalence problem of planar curves under affine and
projective trans... | computer science |
38,542 | SAR Image Segmentation using Vector Quantization Technique on Entropy
Images | cs.MM | The development and application of various remote sensing platforms result in
the production of huge amounts of satellite image data. Therefore, there is an
increasing need for effective querying and browsing in these image databases.
In order to take advantage and make good use of satellite images data, we must
be abl... | computer science |
38,543 | Graphic Symbol Recognition using Graph Based Signature and Bayesian
Network Classifier | cs.CV | We present a new approach for recognition of complex graphic symbols in
technical documents. Graphic symbol recognition is a well known challenge in
the field of document image analysis and is at heart of most graphic
recognition systems. Our method uses structural approach for symbol
representation and statistical cla... | computer science |
38,544 | Employing fuzzy intervals and loop-based methodology for designing
structural signature: an application to symbol recognition | cs.CV | Motivation of our work is to present a new methodology for symbol
recognition. We support structural methods for representing visual associations
in graphic documents. The proposed method employs a structural approach for
symbol representation and a statistical classifier for recognition. We
vectorize a graphic symbol,... | computer science |
38,545 | L2-optimal image interpolation and its applications to medical imaging | cs.CV | Digital medical images are always displayed scaled to fit particular view.
Interpolation is responsible for this scaling, and if not done properly, can
significantly degrade diagnostic image quality. However, theoretically-optimal
interpolation algorithms may also be the most time-consuming and impractical.
We propose ... | computer science |
38,546 | Algorithm for Sector Spectra Calculation from Images Registered by the
Spectral Airglow Temperature Imager | cs.CV | The Spectral Airglow Temperature Imager is an instrument, specially designed
for investigation of the wave processes in the Mesosphere-Lower Thermosphere.
In order to determine the kinematic parameters of a wave, the values of a
physical quantity in different space points and their changes in the time
should be known. ... | computer science |
38,547 | Large gaps imputation in remote sensed imagery of the environment | stat.AP | Imputation of missing data in large regions of satellite imagery is necessary
when the acquired image has been damaged by shadows due to clouds, or
information gaps produced by sensor failure.
The general approach for imputation of missing data, that could not be
considered missed at random, suggests the use of other... | computer science |
38,548 | Polyharmonic Daubechies type wavelets in Image Processing and Astronomy,
II | math.NA | We consider the application of the polyharmonic subdivision wavelets (of
Daubechies type) to Image Processing, in particular to Astronomical Images. The
results show an essential advantage over some standard multivariate wavelets
and a potential for better compression. | computer science |
38,549 | Variational Iteration Method for Image Restoration | math.NA | The famous Perona-Malik (P-M) equation which was at first introduced for
image restoration has been solved via various numerical methods. In this paper
we will solve it for the first time via applying a new numerical method called
the Variational Iteration Method (VIM) and the correspondent approximated
solutions will ... | computer science |
38,550 | Defining and Generating Axial Lines from Street Center Lines for better
Understanding of Urban Morphologies | cs.CV | Axial lines are defined as the longest visibility lines for representing
individual linear spaces in urban environments. The least number of axial lines
that cover the free space of an urban environment or the space between
buildings constitute what is often called an axial map. This is a fundamental
tool in space synt... | computer science |
38,551 | Fast Color Quantization Using Weighted Sort-Means Clustering | cs.CV | Color quantization is an important operation with numerous applications in
graphics and image processing. Most quantization methods are essentially based
on data clustering algorithms. However, despite its popularity as a general
purpose clustering algorithm, k-means has not received much respect in the
color quantizat... | computer science |
38,552 | Image Segmentation with Multidimensional Refinement Indicators | math.NA | We transpose an optimal control technique to the image segmentation problem.
The idea is to consider image segmentation as a parameter estimation problem.
The parameter to estimate is the color of the pixels of the image. We use the
adaptive parameterization technique which builds iteratively an optimal
representation ... | computer science |
38,553 | Tensor-SIFT based Earth Mover's Distance for Contour Tracking | cs.CV | Contour tracking in adverse environments is a challenging problem due to
cluttered background, illumination variation, occlusion, and noise, among
others. This paper presents a robust contour tracking method by contributing to
some of the key issues involved, including (a) a region functional formulation
and its optimi... | computer science |
38,554 | An Effective Method of Image Retrieval using Image Mining Techniques | cs.CV | The present research scholars are having keen interest in doing their
research activities in the area of Data mining all over the world. Especially,
[13]Mining Image data is the one of the essential features in this present
scenario since image data plays vital role in every aspect of the system such
as business for ma... | computer science |
38,555 | Image Deblurring and Super-resolution by Adaptive Sparse Domain
Selection and Adaptive Regularization | cs.CV | As a powerful statistical image modeling technique, sparse representation has
been successfully used in various image restoration applications. The success
of sparse representation owes to the development of l1-norm optimization
techniques, and the fact that natural images are intrinsically sparse in some
domain. The i... | computer science |
38,556 | Automatic Image Segmentation by Dynamic Region Merging | cs.CV | This paper addresses the automatic image segmentation problem in a region
merging style. With an initially over-segmented image, in which the many
regions (or super-pixels) with homogeneous color are detected, image
segmentation is performed by iteratively merging the regions according to a
statistical test. There are ... | computer science |
38,557 | Characterizing Structure Through Shape Matching and Applications to Self
Assembly | cs.CV | Structural quantities such as order parameters and correlation functions are
often employed to gain insight into the physical behavior and properties of
condensed matter systems. While standard quantities for characterizing
structure exist, often they are insufficient for treating problems in the
emerging field of nano... | computer science |
38,558 | Natural images from the birthplace of the human eye | cs.CV | Here we introduce a database of calibrated natural images publicly available
through an easy-to-use web interface. Using a Nikon D70 digital SLR camera, we
acquired about 5000 six-megapixel images of Okavango Delta of Botswana, a
tropical savanna habitat similar to where the human eye is thought to have
evolved. Some s... | computer science |
38,559 | Total variation regularization for fMRI-based prediction of behaviour | cs.CV | While medical imaging typically provides massive amounts of data, the
extraction of relevant information for predictive diagnosis remains a difficult
challenge. Functional MRI (fMRI) data, that provide an indirect measure of
task-related or spontaneous neuronal activity, are classically analyzed in a
mass-univariate pr... | computer science |
38,560 | A Comparison of Two Human Brain Tumor Segmentation Methods for MRI Data | cs.CV | The most common primary brain tumors are gliomas, evolving from the cerebral
supportive cells. For clinical follow-up, the evaluation of the preoperative
tumor volume is essential. Volumetric assessment of tumor volume with manual
segmentation of its outlines is a time-consuming process that can be overcome
with the he... | computer science |
38,561 | An Efficient and Integrated Algorithm for Video Enhancement in
Challenging Lighting Conditions | cs.GR | We describe a novel integrated algorithm for real-time enhancement of video
acquired under challenging lighting conditions. Such conditions include low
lighting, haze, and high dynamic range situations. The algorithm automatically
detects the dominate source of impairment, then depending on whether it is low
lighting, ... | computer science |
38,562 | Searching in one billion vectors: re-rank with source coding | cs.IR | Recent indexing techniques inspired by source coding have been shown
successful to index billions of high-dimensional vectors in memory. In this
paper, we propose an approach that re-ranks the neighbor hypotheses obtained by
these compressed-domain indexing methods. In contrast to the usual
post-verification scheme, wh... | computer science |
38,563 | Weighted Radial Variation for Node Feature Classification | cs.CV | Connections created from a node-edge matrix have been traditionally difficult
to visualize and analyze because of the number of flows to be rendered in a
limited feature or cartographic space. Because analyzing connectivity patterns
is useful for understanding the complex dynamics of human and information flow
that con... | computer science |
38,564 | Continuous Multiclass Labeling Approaches and Algorithms | cs.CV | We study convex relaxations of the image labeling problem on a continuous
domain with regularizers based on metric interaction potentials. The generic
framework ensures existence of minimizers and covers a wide range of
relaxations of the originally combinatorial problem. We focus on two specific
relaxations that diffe... | computer science |
38,565 | An Algorithm for Repairing Low-Quality Video Enhancement Techniques
Based on Trained Filter | cs.CV | Multifarious image enhancement algorithms have been used in different
applications. Still, some algorithms or modules are imperfect for practical
use. When the image enhancement modules have been fixed or combined by a series
of algorithms, we need to repair them as a whole part without changing the
inside. This report... | computer science |
38,566 | A Medial Axis Based Thinning Strategy for Character Images | cs.CV | Thinning of character images is a big challenge. Removal of strokes or
deformities in thinning is a difficult problem. In this paper, we have proposed
a medial axis based thinning strategy used for performing skeletonization of
printed and handwritten character images. In this method, we have used shape
characteristics... | computer science |
38,567 | Aorta Segmentation for Stent Simulation | cs.CV | Simulation of arterial stenting procedures prior to intervention allows for
appropriate device selection as well as highlights potential complications. To
this end, we present a framework for facilitating virtual aortic stenting from
a contrast computer tomography (CT) scan. More specifically, we present a
method for b... | computer science |
38,568 | Adaptive mosaic image representation for image processing | cs.CV | Method for a mosaic image representation (MIR) is proposed for a selective
treatment of image fragments of different transition frequency. MIR method is
based on piecewise-constant image approximation on a non-uniform orthogonal
grid constructed by the following recurrent multigrid algorithm. A sequence of
nested unifo... | computer science |
38,569 | SO(3)-invariant asymptotic observers for dense depth field estimation
based on visual data and known camera motion | math.OC | In this paper, we use known camera motion associated to a video sequence of a
static scene in order to estimate and incrementally refine the surrounding
depth field. We exploit the SO(3)-invariance of brightness and depth fields
dynamics to customize standard image processing techniques. Inspired by the
Horn-Schunck me... | computer science |
38,570 | Multi-parameter acoustic imaging of uniform objects in inhomogeneous
media | cs.CV | The problem studied in this paper is ultrasound image reconstruction from
frequency-domain measurements of the scattered field from an object with
contrast in attenuation and sound speed. The case where the object has uniform
but unknown contrast in these properties relative to the background is
considered. Background ... | computer science |
38,571 | A comparison of Gap statistic definitions with and without logarithm
function | stat.ME | The Gap statistic is a standard method for determining the number of clusters
in a set of data. The Gap statistic standardizes the graph of $\log(W_{k})$,
where $W_{k}$ is the within-cluster dispersion, by comparing it to its
expectation under an appropriate null reference distribution of the data. We
suggest to use $W... | computer science |
38,572 | A Parametric Level Set Approach to Simultaneous Object Identification
and Background Reconstruction for Dual Energy Computed Tomography | cs.CV | Dual energy computerized tomography has gained great interest because of its
ability to characterize the chemical composition of a material rather than
simply providing relative attenuation images as in conventional tomography. The
purpose of this paper is to introduce a novel polychromatic dual energy
processing algor... | computer science |
38,573 | Streaming Multimedia Information Using the Features of the DVB-S Card | cs.MM | This paper presents a study of audio-video streaming using the additional
possibilities of a DVB-S card. The board used for experiments (Technisat
SkyStar 2) is one of the most frequently used cards for this purpose. Using the
main blocks of the board's software support it is possible the implement a
really useful and ... | computer science |
38,574 | View subspaces for indexing and retrieval of 3D models | cs.CV | View-based indexing schemes for 3D object retrieval are gaining popularity
since they provide good retrieval results. These schemes are coherent with the
theory that humans recognize objects based on their 2D appearances. The
viewbased techniques also allow users to search with various queries such as
binary images, ra... | computer science |
38,575 | Salient Local 3D Features for 3D Shape Retrieval | cs.CV | In this paper we describe a new formulation for the 3D salient local features
based on the voxel grid inspired by the Scale Invariant Feature Transform
(SIFT). We use it to identify the salient keypoints (invariant points) on a 3D
voxelized model and calculate invariant 3D local feature descriptors at these
keypoints. ... | computer science |
38,576 | Retrieval and Clustering from a 3D Human Database based on Body and Head
Shape | cs.CV | In this paper, we describe a framework for similarity based retrieval and
clustering from a 3D human database. Our technique is based on both body and
head shape representation and the retrieval is based on similarity of both of
them. The 3D human database used in our study is the CAESAR anthropometric
database which c... | computer science |
38,577 | Face Shape and Reflectance Acquisition using a Multispectral Light Stage | cs.CV | In this thesis, we discuss the design and calibration (geometric and
radiometric) of a novel shape and reflectance acquisition device called the
"Multispectral Light Stage". This device can capture highly detailed facial
geometry (down to the level of skin pores detail) and Multispectral reflectance
map which can be us... | computer science |
38,578 | Benchmarks, Performance Evaluation and Contests for 3D Shape Retrieval | cs.CV | Benchmarking of 3D Shape retrieval allows developers and researchers to
compare the strengths of different algorithms on a standard dataset. Here we
describe the procedures involved in developing a benchmark and issues involved.
We then discuss some of the current 3D shape retrieval benchmarks efforts of
our group and ... | computer science |
38,579 | Hierarchical Recursive Running Median | cs.DS | To date, the histogram-based running median filter of Perreault and H\'ebert
is considered the fastest for 8-bit images, being roughly O(1) in average case.
We present here another approximately constant time algorithm which further
improves the aforementioned one and exhibits lower associated constant, being
at the ti... | computer science |
38,580 | Human Identity Verification based on Heart Sounds: Recent Advances and
Future Directions | cs.CV | Identity verification is an increasingly important process in our daily
lives, and biometric recognition is a natural solution to the authentication
problem.
One of the most important research directions in the field of biometrics is
the characterization of novel biometric traits that can be used in conjunction
with ... | computer science |
38,581 | Scale-Invariant Local Descriptor for Event Recognition in 1D Sensor
Signals | cs.MM | In this paper, we introduce a shape-based, time-scale invariant feature
descriptor for 1-D sensor signals. The time-scale invariance of the feature
allows us to use feature from one training event to describe events of the same
semantic class which may take place over varying time scales such as walking
slow and walkin... | computer science |
38,582 | RASID: A Robust WLAN Device-free Passive Motion Detection System | cs.NI | WLAN Device-free passive DfP indoor localization is an emerging technology
enabling the localization of entities that do not carry any devices nor
participate actively in the localization process using the already installed
wireless infrastructure. This technology is useful for a variety of
applications such as intrusi... | computer science |
38,583 | Who clicks there!: Anonymizing the photographer in a camera saturated
society | cs.CR | In recent years, social media has played an increasingly important role in
reporting world events. The publication of crowd-sourced photographs and videos
in near real-time is one of the reasons behind the high impact. However, the
use of a camera can draw the photographer into a situation of conflict.
Examples include... | computer science |
38,584 | Nested Graph Words for Object Recognition | cs.MM | In this paper, we propose a new, scalable approach for the task of object
based image search or object recognition. Despite the very large literature
existing on the scalability issues in CBIR in the sense of retrieval
approaches, the scalability of media and scalability of features remain an
issue. In our work we tack... | computer science |
38,585 | Visual Secret Sharing Scheme using Grayscale Images | cs.CR | Pixel expansion and the quality of the reconstructed secret image has been a
major issue of visual secret sharing (VSS) schemes. A number of probabilistic
VSS schemes with minimum pixel expansion have been proposed for black and white
(binary) secret images. This paper presents a probabilistic (2, 3)-VSS scheme
for gra... | computer science |
38,586 | A Invertible Dimension Reduction of Curves on a Manifold | cs.CV | In this paper, we propose a novel lower dimensional representation of a shape
sequence. The proposed dimension reduction is invertible and computationally
more efficient in comparison to other related works. Theoretically, the
differential geometry tools such as moving frame and parallel transportation
are successfully... | computer science |
38,587 | Hamiltonian Streamline Guided Feature Extraction with Applications to
Face Detection | cs.CV | We propose a new feature extraction method based on two dynamical systems
induced by intensity landscape: the negative gradient system and the
Hamiltonian system. We build features based on the Hamiltonian streamlines.
These features contain nice global topological information about the intensity
landscape, and can be ... | computer science |
38,588 | Solving Principal Component Pursuit in Linear Time via $l_1$ Filtering | cs.NA | In the past decades, exactly recovering the intrinsic data structure from
corrupted observations, which is known as robust principal component analysis
(RPCA), has attracted tremendous interests and found many applications in
computer vision. Recently, this problem has been formulated as recovering a
low-rank component... | computer science |
38,589 | Runtime Guarantees for Regression Problems | cs.DS | We study theoretical runtime guarantees for a class of optimization problems
that occur in a wide variety of inference problems. these problems are
motivated by the lasso framework and have applications in machine learning and
computer vision.
Our work shows a close connection between these problems and core question... | computer science |
38,590 | A robust, low-cost approach to Face Detection and Face Recognition | cs.CV | In the domain of Biometrics, recognition systems based on iris, fingerprint
or palm print scans etc. are often considered more dependable due to extremely
low variance in the properties of these entities with respect to time. However,
over the last decade data processing capability of computers has increased
manifold, ... | computer science |
38,591 | Securing Biometric Images using Reversible Watermarking | cs.CV | Biometric security is a fast growing area. Protecting biometric data is very
important since it can be misused by attackers. In order to increase security
of biometric data there are different methods in which watermarking is widely
accepted. A more acceptable, new important development in this area is
reversible water... | computer science |
38,592 | Speculative Parallel Evaluation Of Classification Trees On GPGPU Compute
Engines | cs.DC | We examine the problem of optimizing classification tree evaluation for
on-line and real-time applications by using GPUs. Looking at trees with
continuous attributes often used in image segmentation, we first put the
existing algorithms for serial and data-parallel evaluation on solid footings.
We then introduce a spec... | computer science |
38,593 | Face Recognition Using Discrete Cosine Transform for Global and Local
Features | cs.CV | Face Recognition using Discrete Cosine Transform (DCT) for Local and Global
Features involves recognizing the corresponding face image from the database.
The face image obtained from the user is cropped such that only the frontal
face image is extracted, eliminating the background. The image is restricted to
a size of ... | computer science |
38,594 | Digital Manifolds and the Theorem of Jordan-Brouwer | cs.CV | We give an answer to the question given by T.Y.Kong in his article "Can 3-D
Digital Topology be Based on Axiomatically Defined Digital Spaces?" In this
article he asks the question, if so called "good pairs" of neighborhood
relations can be found on the set Z^n such that the existence of digital
manifolds of dimension ... | computer science |
38,595 | A prototype system for handwritten sub-word recognition: Toward
Arabic-manuscript transliteration | cs.CV | A prototype system for the transliteration of diacritics-less Arabic
manuscripts at the sub-word or part of Arabic word (PAW) level is developed.
The system is able to read sub-words of the input manuscript using a set of
skeleton-based features. A variation of the system is also developed which
reads archigraphemic Ar... | computer science |
38,596 | The Object Projection Feature Estimation Problem in Unsupervised
Markerless 3D Motion Tracking | cs.CV | 3D motion tracking is a critical task in many computer vision applications.
Existing 3D motion tracking techniques require either a great amount of
knowledge on the target object or specific hardware. These requirements
discourage the wide spread of commercial applications based on 3D motion
tracking. 3D motion trackin... | computer science |
38,597 | Enhancement of Image Resolution by Binarization | cs.CV | Image segmentation is one of the principal approaches of image processing.
The choice of the most appropriate Binarization algorithm for each case proved
to be a very interesting procedure itself. In this paper, we have done the
comparison study between the various algorithms based on Binarization
algorithms and propos... | computer science |
38,598 | A New IRIS Normalization Process For Recognition System With
Cryptographic Techniques | cs.CV | Biometric technologies are the foundation of personal identification systems.
It provides an identification based on a unique feature possessed by the
individual. This paper provides a walkthrough for image acquisition,
segmentation, normalization, feature extraction and matching based on the Human
Iris imaging. A Cann... | computer science |
38,599 | Distributed Representation of Geometrically Correlated Images with
Compressed Linear Measurements | cs.CV | This paper addresses the problem of distributed coding of images whose
correlation is driven by the motion of objects or positioning of the vision
sensors. It concentrates on the problem where images are encoded with
compressed linear measurements. We propose a geometry-based correlation model
in order to describe the ... | computer science |
38,600 | Minutiae Extraction from Fingerprint Images - a Review | cs.CV | Fingerprints are the oldest and most widely used form of biometric
identification. Everyone is known to have unique, immutable fingerprints. As
most Automatic Fingerprint Recognition Systems are based on local ridge
features known as minutiae, marking minutiae accurately and rejecting false
ones is very important. Howe... | computer science |
38,601 | An efficient FPGA implementation of MRI image filtering and tumor
characterization using Xilinx system generator | cs.AR | This paper presents an efficient architecture for various image filtering
algorithms and tumor characterization using Xilinx System Generator (XSG). This
architecture offers an alternative through a graphical user interface that
combines MATLAB, Simulink and XSG and explores important aspects concerned to
hardware impl... | computer science |
38,602 | Enhancing Volumetric Bouligand-Minkowski Fractal Descriptors by using
Functional Data Analysis | cs.CV | This work proposes and study the concept of Functional Data Analysis
transform, applying it to the performance improving of volumetric
Bouligand-Minkowski fractal descriptors. The proposed transform consists
essentially in changing the descriptors originally defined in the space of the
calculus of fractal dimension int... | computer science |
38,603 | Shape analysis using fractal dimension: a curvature based approach | cs.CV | The present work shows a novel fractal dimension method for shape analysis.
The proposed technique extracts descriptors from the shape by applying a
multiscale approach to the calculus of the fractal dimension of that shape. The
fractal dimension is obtained by the application of the curvature scale-space
technique to ... | computer science |
38,604 | Assessing the Value of 3D Reconstruction in Building Construction | cs.HC | 3-dimensional (3D) reconstruction is an emerging field in image processing
and computer vision that aims to create 3D visualizations/ models of objects/
scenes from image sets. However, its commercial applications and benefits are
yet to be fully explored. In this paper, we describe ongoing work towards
assessing the v... | computer science |
38,605 | A New Color Feature Extraction Method Based on Dynamic Color
Distribution Entropy of Neighborhoods | cs.CV | One of the important requirements in image retrieval, indexing,
classification, clustering and etc. is extracting efficient features from
images. The color feature is one of the most widely used visual features. Use
of color histogram is the most common way for representing color feature. One
of disadvantage of the col... | computer science |
38,606 | Fractal Descriptors Based on Fourier Spectrum Applied to Texture
Analysis | cs.CV | This work proposes the development and study of a novel technique for the
generation of fractal descriptors used in texture analysis. The novel
descriptors are obtained from a multiscale transform applied to the Fourier
technique of fractal dimension calculus. The power spectrum of the Fourier
transform of the image is... | computer science |
38,607 | Multi-Level Feature Descriptor for Robust Texture Classification via
Locality-Constrained Collaborative Strategy | cs.CV | This paper introduces a simple but highly efficient ensemble for robust
texture classification, which can effectively deal with translation, scale and
changes of significant viewpoint problems. The proposed method first inherits
the spirit of spatial pyramid matching model (SPM), which is popular for
encoding spatial d... | computer science |
38,608 | Using Hausdorff Distance for New Medical Image Annotation | cs.IR | Medical images annotation is most of the time a repetitive hard task.
Collecting old similar annotations and assigning them to new medical images may
not only enhance the annotation process, but also reduce ambiguity caused by
repetitive annotations. The goal of this work is to propose an approach based
on Hausdorff di... | computer science |
38,609 | Enhancement Techniques for Local Content Preservation and Contrast
Improvement in Images | cs.CV | There are several images that do not have uniform brightness which pose a
challenging problem for image enhancement systems. As histogram equalization
has been successfully used to correct for uniform brightness problems, a
histogram equalization method that utilizes human visual system based
thresholding(human vision ... | computer science |
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