In this paper, we introduce the new task of reconstructing 3D human pose from a single image in which we can see the person and the person’s image through a mirror. Compared to general scenarios of 3D pose estimation from a single view, the mirror reflection provides an additional view for resolving the depth ambiguity. We develop an optimization-based approach that exploits mirror symmetry constraints for accurate 3D pose reconstruction. We also provide a method to estimate the surface normal of the mirror from vanishing points in the single image. To validate the proposed approach, we collect a large-scale dataset named Mirrored-Human, which covers a large variety of human subjects, poses and backgrounds. The experiments demonstrate that, when trained on Mirrored-Human with our reconstructed 3D poses as pseudo ground-truth, the accuracy and generalizability of existing single-view 3D pose estimators can be largely improved. The code and dataset are available at https://zju3dv.github.io/Mirrored-Human/. 2021: Qi Fang, Qing Shuai, Junting Dong, H. Bao, Xiaowei Zhou https://arxiv.org/pdf/2104.00340v1.pdf
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