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I was trying to learn a few things on CBIR(content-based Information Retrieval). To do so I try to implement research papers and in one of the papers [link], the following is mentioned.

Algo

My main doubt is in step 3, I have done some digging on this and found 5 types of morphological gradients

  • basic_gradient
  • internal_gradient
  • external_gradient
  • horizontal_gradient
  • vertical_gradient

Are these the gradients the author is referring to or are there others that I am not considering?

XXDIL
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  • Who knows what the author is referring to? Is there no more detailed explanation? Write to the author and ask for the source code. – Cris Luengo Nov 01 '21 at 14:19
  • How would you proceed with shape extraction? Any method is fine. – XXDIL Nov 01 '21 at 17:33
  • You don't have enough information to reproduce the results. Usually, the two most basic morphological gradients are dilation-erosion and closing-opening. Contact the authors. – FiReTiTi Nov 01 '21 at 18:56

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