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Recently, I do some literature research about CNN and find there is a concept of

end to end training

Such as the abstract in Fully Convolutional Networks for Semantic Segmentation

How to understand that? What is end-to-end training?

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  • $\begingroup$ I understand now. It means that during training, the algorithm does not have separate procedures, just have one step. $\endgroup$ – karl_TUM Sep 4 '16 at 19:18
  • $\begingroup$ +1 for linking to a great paper :-) $\endgroup$ – DeltaIV Jul 5 '18 at 9:33
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Traditionally, we extract pre-defined features before prediction.

data -> extracted features -> learning algorithm -> output

However, hand-engineered features limit the potential performance as some of them are poor approximation of reality and some of them throw away some information.

End-to-end learning means that we replace the pipeline with a single learning algorithm so that it goes directly from the input to the desired output to overcome limitations of the traditional approach.

data -> learning algorithm -> output

End-to-end learning system tend to do better when there is a lot of labeled data as the learning algorithm can somehow learn features by itself. When the training set is small, it tends to do worse than hand-engineered pipeline.

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