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Pose Proposal Networks

We propose a novel method to detect an unknown number of articulated 2D poses in real time. To decouple the runtime complexity of pixel-wise body part detectors from their convolutional neural network (CNN) feature map resolutions, our approach, called pose proposal networks, introduces a state-of-the-art single-shot object detection paradigm using grid-wise image feature maps in a bottom-up pose detection scenario. Body part proposals, which are represented as region proposals, and limbs are detected directly via a single-shot CNN. Specialized to such detections, a bottom-up greedy parsing step is probabilistically redesigned to take into account the global context. Experimental results on the MPII Multi-Person benchmark confirm that our method achieves 72.8% mAP comparable to state-of-the-art bottom-up approaches while its total runtime using a GeForce GTX1080Ti card reaches up to 5.6 ms (180 FPS), which exceeds the bottleneck runtimes that are observed in state-of-the-art approaches.

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