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Why gradients can not be propagated backward to the input proposal coordinates in the RoI pooling layer? #78

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Dorniwang opened this issue Dec 30, 2017 · 0 comments
Open

Why gradients can not be propagated backward to the input proposal coordinates in the RoI pooling layer? #78

Dorniwang opened this issue Dec 30, 2017 · 0 comments

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@Dorniwang
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just like what i ask in title, in paper author said "gradients can be propagated backward from the output features to the input features, but not to the input proposal coordinates", i want to know why? thanks.
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@Dorniwang