Learning by Analogy: Reliable Supervision from Transformations for Unsupervised Optical Flow Estimation

• URL: http://arxiv.org/abs/2003.13045v2
• Date: Sun, 29 Nov 2020 12:26:25 GMT
• Title: Learning by Analogy: Reliable Supervision from Transformations for Unsupervised Optical Flow Estimation
• Authors: Liang Liu, Jiangning Zhang, Ruifei He, Yong Liu, Yabiao Wang, Ying Tai, Donghao Luo, Chengjie Wang, Jilin Li, Feiyue Huang
• Abstract summary: Unsupervised learning of optical flow has emerged as a promising alternative to supervised methods. We present a framework to use more reliable supervision from transformations. Our method consistently gets a leap of performance on several benchmarks with the best accuracy among deep unsupervised methods.
• Score: 83.23707895728995
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Unsupervised learning of optical flow, which leverages the supervision from view synthesis, has emerged as a promising alternative to supervised methods. However, the objective of unsupervised learning is likely to be unreliable in challenging scenes. In this work, we present a framework to use more reliable supervision from transformations. It simply twists the general unsupervised learning pipeline by running another forward pass with transformed data from augmentation, along with using transformed predictions of original data as the self-supervision signal. Besides, we further introduce a lightweight network with multiple frames by a highly-shared flow decoder. Our method consistently gets a leap of performance on several benchmarks with the best accuracy among deep unsupervised methods. Also, our method achieves competitive results to recent fully supervised methods while with much fewer parameters.

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