Research Progress of Deep Optical Flow Estimation

Combining the deep learning model to compute end-to-end optical flow is a hot topic in current computer vision field.The optical flow estimation methods based on deep learning are summarized and reviewed.Firstly,the origin and concept of optical flow is introduced.Secondly,the optical flow datasets and evaluation metrics are summarized.Most importantly,classical methods are introduced and the deep optical flow estimation methods are reviewed in three aspects,including supervised deep optical flow estimation methods,unsupervised deep optical flow estimation methods and the performance of these methods.The analysis shows designing compact and generalized deep optical flow model is the future research direction.On this basis,the joint learning of optical flow estimation and specific video analysis tasks are introduced.It is pointed out that the design of task-driven deep optical flow network is a valuable research direction in practice application.Finally,the problems and challenges of deep optical flow estimation are summarized and the future work of this field is prospected.