How can i extract shape features of an image for content based image retrieval ?

I am trying to use the shape information in a content based image retrieval system, and i don't know which algorithm is best to extract the features and based on what to chose it.

Answer 1

[Mandar]

The “regionpropos” function can be used to compute various shape features of the object. For example, Major axis length, Area, Perimeter, and so on. Refer the following documentation link to know more about “regionprops” function.

https://in.mathworks.com/help/images/ref/regionprops.html

In addition, refer the following answered question for the steps to be followed for shape feature extraction.

https://in.mathworks.com/matlabcentral/answers/841295-matlab-code-for-extract-shape-features-from-an-image-including-circle-and-rectangle