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README.md
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Hugging Face's logo
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---
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language:
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- om
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- am
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- rw
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- rn
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- ha
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- ig
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- pcm
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- so
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- sw
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- ti
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- yo
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- multilingual
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---
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# Mask R-CNN
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## Model desription
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Mask R-CNN is a model that extends Faster R-CNN by adding a branch for predicting an object mask in parallel with the existing branch for bounding box recognition. The model locates pixels of images instead of just bounding boxes as Faster R-CNN was not designed for pixel-to-pixel alignment between network inputs and outputs.
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### More information on the model and dataset:
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### The model
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Mask R-CNN works towards the approach of instance segmentation, which involves object detection, and semantic segmentation. For object detection, Mask R-CNN uses an architecture that is similar to Faster R-CNN, while it uses a Fully Convolutional Network(FCN) for semantic segmentation.
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The FCN is added to the top of features of a Faster R-CNN to generate a mask segmentation output. This segmentation output is in parallel with the classification and bounding box regressor network of the Faster R-CNN model. From the advancement of Fast R-CNN Region of Interest Pooling(ROI), Mask R-CNN adds refinement called ROI aligning by addressing the loss and misalignment of ROI Pooling; the new ROI aligned leads to improved results.
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### Technical Specifications
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Please [read the paper](https://arxiv.org/pdf/1703.06870.pdf) for more information on training.
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The model architecture is divided into two parts:
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- Region proposal network (RPN) to propose candidate object bounding boxes.
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- Binary mask classifier to generate a mask for every class
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#### Technical Summary.
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- Mask R-CNN is quite similar to the structure of faster R-CNN.
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- Outputs a binary mask for each Region of Interest.
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- Applies bounding-box classification and regression in parallel, simplifying the original R-CNN's multi-stage pipeline.
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- The network architectures utilized are called ResNet and ResNeXt. The depth can be either 50 or 101
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#### Results Summary
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- Instance Segmentation: Based on the COCO dataset, Mask R-CNN outperforms all categories compared to MNC and FCIS, which are state-of-the-art model.
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- Bounding Box Detection: Mask R-CNN outperforms the base variants of all previous state-of-the-art models, including the COCO 2016 Detection Challenge winner.
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## Intended uses & limitations
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- With great generality, Mask RCNN can be extended to human pose estimation.
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## Training Procedure
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Please [read the paper](https://arxiv.org/pdf/1703.06870.pdf) for more information on training, or check OpenMMLab [repository](https://github.com/open-mmlab/mmdetection/tree/master/configs/mask_rcnn)
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