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For a frame in video 1, TCC finds the nearest neighbor (NN) in video 2. To go back to video 1, we find the nearest neighbor of NN in video 1. If we came back to the frame we started from, the frames are cycle-consistent. TCC minimizes this cycle-consistency error.pic.twitter.com/9dUqwI4Ao0
ML highlights from the paper: 1. Cycle-consistency loss applied directly on low dimensional embeddings (without GAN / decoder). 2. Soft-nearest neighbors to find correspondences across videos. Training method:pic.twitter.com/GnD6jw9ZSX
TCC discovers the phases of an action without additional labels. In this video, we retrieve nearest neighbors in the embedding space to frames in the reference video. In spite of many variations, TCC maps semantically similar frames to nearby points in the embedding space.pic.twitter.com/k4o4y4o6gE
Self-supervised methods are quite useful in the few-shot setting. Consider the action phase classification task. With only 1 labeled video TCC achieves similar performance to vanilla supervised learning models trained with ~50 videos.pic.twitter.com/Xu26Tpr68y
Some applications of the per-frame embeddings learned using TCC: 1. Unsupervised video alignmentpic.twitter.com/bAMpiOIRwd
This is joint work with @yusufaytar , Jonathan Tompson, @psermanet and Andrew Zisserman.
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