Is end-to-end learning enough for fitness activity recognition?
Antoine Mercier Guillaume Berger Sunny Panchal Florian Letsch Cornelius Boehm Nahua Kang Ingo Bax Roland Memisevic
End-to-end learning has taken hold of many computer vision tasks, in
particular, related to still images, with task-specific optimization yielding
very strong performance. Nevertheless, human-centric action recognition is
still largely dominated by hand-crafted pipelines, and only individual
components are replaced by neural networks that typically operate on individual
frames. As a testbed to study the relevance of such pipelines, we present a new
fully annotated video dataset of fitness activities. Any recognition
capabilities in this domain are almost exclusively a function of human poses
and their temporal dynamics, so pose-based solutions should perform well. We
show that, with this labelled data, end-to-end learning on raw pixels can
compete with state-of-the-art action recognition pipelines based on pose
estimation. We also show that end-to-end learning can support temporally
fine-grained tasks such as real-time repetition counting.