Mr. Li Chen Profile

Li Chen

at Nanjing Univ of Aeronautics and Astronautics

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Proceedings Article | 27 June 2023 Paper

Multi-task learning using optical flow for motion magnification

Li Chen, Bingchao Zhao, Xiaoyue Liu, Zhaozhou Cai, Cong Peng

Proceedings Volume 12705, 127052V (2023) https://doi.org/10.1117/12.2680446

KEYWORDS: Optical flow, Motion estimation, Network architectures, Video, Visualization

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The human visual systems cannot directly discern subtle but meaningful variations, such as the facial micro-expressions and the structural vibrations. Motion magnification techniques allow the naked eyes to perceive these variations. Current approaches on motion magnification generally belong to the Lagrangian and Eulerian perspectives. Nevertheless, the methods either require heavy computation or cannot extract tiny but valuable variations from noise disturbance. This paper utilizes multi-task learning to unite the Lagrangian and Eulerian perspectives for a novel motion magnification method. First, the method develops a multi-task network, which utilizes optical flow estimation to support motion magnification with accurate motion extraction. The homoscedastic uncertainty is then applied to balance task relation in the loss functions. In order to support multi-task learning, a simulated dataset is synthesized with real images from public datasets. Finally, the experimental results demonstrate that the proposed method exceeds the previous ones and optical flow can effectively support motion magnification.

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