jfzhuang / IFR

[CVPR'22] Semi-Supervised Video Semantic Segmentation with Inter-Frame Feature Reconstruction
MIT License
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About the definition of semi-supervised. #4

Closed imzhangyd closed 1 year ago

imzhangyd commented 1 year ago

Some VSS methods aggregate features of neighborhood unlabeled frames to segment the current frame, so I think these methods also use unlabeled frames for training and they can be considered semi-supervised. Did I misunderstand something here?

jfzhuang commented 1 year ago

Actually, I think the main challenge of semi-supervised learning is the model overfitting issue when given very limited labeled data, e.g., 100 samples in Cityscapes. Although existing methods are proposed to utilize unlabeled frames, they have utilized all labeled samples, e.g. 2975 samples in Cityscapes. Therefore, their models rarely suffer from the overfitting issue and only need to focus on boosting accuracy. In this aspect, I don't think these methods can be considered semi-supervised learning.

Huster-Hq commented 5 months ago

Some VSS methods aggregate features of neighborhood unlabeled frames to segment the current frame, so I think these methods also use unlabeled frames for training and they can be considered semi-supervised. Did I misunderstand something here?

Can you provide me with some relevant papers?