AutoPose: Searching Multi-Scale Branch Aggregation for Pose Estimation

• URL: http://arxiv.org/abs/2008.07018v1
• Date: Sun, 16 Aug 2020 22:27:43 GMT
• Title: AutoPose: Searching Multi-Scale Branch Aggregation for Pose Estimation
• Authors: Xinyu Gong, Wuyang Chen, Yifan Jiang, Ye Yuan, Xianming Liu, Qian Zhang, Yuan Li, Zhangyang Wang
• Abstract summary: We present AutoPose, a novel neural architecture search(NAS) framework. It is capable of automatically discovering multiple parallel branches of cross-scale connections towards accurate and high-resolution 2D human pose estimation.
• Score: 96.29533512606078
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We present AutoPose, a novel neural architecture search(NAS) framework that is capable of automatically discovering multiple parallel branches of cross-scale connections towards accurate and high-resolution 2D human pose estimation. Recently, high-performance hand-crafted convolutional networks for pose estimation show growing demands on multi-scale fusion and high-resolution representations. However, current NAS works exhibit limited flexibility on scale searching, they dominantly adopt simplified search spaces of single-branch architectures. Such simplification limits the fusion of information at different scales and fails to maintain high-resolution representations. The presentedAutoPose framework is able to search for multi-branch scales and network depth, in addition to the cell-level microstructure. Motivated by the search space, a novel bi-level optimization method is presented, where the network-level architecture is searched via reinforcement learning, and the cell-level search is conducted by the gradient-based method. Within 2.5 GPU days, AutoPose is able to find very competitive architectures on the MS COCO dataset, that are also transferable to the MPII dataset. Our code is available at https://github.com/VITA-Group/AutoPose.

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