CIS seminar series - Angela Yao (National University of Singapore)

Centre for Intelligent Sensing

A deep dive of integral pose regression for 2D human pose estimation

(The Zoom link will be provided upon completion of the Eventbrite registration)Title: A deep dive of integral pose regression for 2D human pose estimationPresenter: Angela Yao, National University of Singapore AbstractIntegral pose regression combines an implicit heatmap with end-to-end training for human body and hand pose estimation. Unlike detection-based heatmap methods, which decode final joint positions from the heatmap with a non-differentiable argmax operation, integral regression methods apply a differentiable expectation operation. This talk outlines some results of a deep dive into the inference and back-propagation of integral pose regression to better understand the differences in performance and training compared to detection-based methods. For inference, we give theoretical support why expectation should always be better than the argmax operation, i.e. integral regression should always outperform detection. Yet in practice, this is observed only in hard cases because the heatmap activation for regression shrinks in easy cases. We then experimentally show that the activation shrinkage is one of the leading causes for integral regression&#x27;s inferior performance. For back-propagation, we theoretically and empirically analyze the gradients to explain the slow training speed for integral regression. Based on these findings, we incorporate the supervision of a spatial prior to speed up training and improve performance.BioAngela Yao is a Dean&#x27;s Chair Assistant Professor in the School of Computing at the National University of Singapore. She received a PhD from ETH Zurich and a BASc from the University of Toronto. Angela leads the Computer Vision and Machine Learning group, with a special focus on vision-based human motion analysis. She is the recipient of the German Pattern Recognition (DAGM) award (2018) and Singapore’s National Research Foundation&#x27;s Fellowship in Artificial Intelligence (2019).Programme11:30 - 11:35: Opening and introduction11:35 - 12:20: Talk by Angela Yao12:20 - 12:30: Q&amp;A and closing remarksHost: Changjae Oh, Centre for Intelligent Sensing, Queen Mary University of London

CIS seminar series - Angela Yao (National University of Singapore)

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CIS seminar series - Angela Yao (National University of Singapore)

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