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.
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?