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Synthetic-to-Real Pose Estimation with Geometric Reconstruction Qiuxia Lin 1 Kerui Gu1 Linlin Y ang 2, 3 Angela Y ao 1 1

Neural Information Processing Systems

The warping estimation module W is based on an hourglass with five conv3 3 - bn - relu - pool2 2 in the encoders and five upsample2 2 - conv3 3 - bn - relu blocks in the decoders. In G, we use the Johnson architecture [ 3 ] with two down-sampling blocks, six residual-blocks and two up-sampling blocks. The design follows [ 7 ]. The inputs are the base image, displacement field, and inpainting map. It downsampled 4 and upsampled 4 to get the output, i.e. the reconstructed image.


Synthetic-to-Real Pose Estimation with Geometric Reconstruction Qiuxia Lin 1 Kerui Gu1 Linlin Y ang 2, 3 Angela Y ao 1 1

Neural Information Processing Systems

Pose estimation is remarkably successful under supervised learning, but obtaining annotations, especially for new deployments, is costly and time-consuming. This work tackles adapting models trained on synthetic data to real-world target domains with only unlabelled data. A common approach is model fine-tuning with pseudo-labels from the target domain; yet many pseudo-labelling strategies cannot provide sufficient high-quality pose labels. This work proposes a reconstruction-based strategy as a complement to pseudo-labelling for synthetic-to-real domain adaptation. We generate the driving image by geometrically transforming a base image according to the predicted keypoints and enforce a reconstruction loss to refine the predictions. It provides a novel solution to effectively correct confident yet inaccurate keypoint locations through image reconstruction in domain adaptation. Our approach outperforms the previous state-of-the-arts by 8% for PCK on four large-scale hand and human real-world datasets. In particular, we excel on endpoints such as fingertips and head, with 7.2% and 29.9% improvements in PCK.


Video Prediction via Selective Sampling

Jingwei Xu, Bingbing Ni, Xiaokang Yang

Neural Information Processing Systems

This module is trained in an adversarial learning manner [5]. The Selectionmodule selects high possibility candidates from proposals and combines to produce the final prediction, according to the criteria of better position matching.