I was solving my Image Processing - Features descriptors when I came across this problem. I could not understand the difference between image detectors and descriotors

I tried googling but could not get any clear differences.

CodePudding user response：

A feature detector merely finds features (of some desired kind) in an image. There is little that you can do with just a list of where features were found.

A feature descriptor characterizes a feature by geometric (size, orientation, shape, ...) or radiometric quantities (lightness, saturation variance, local structure tensor...): it describes the feature by means of a list of numerical properties. Descriptors allow to match features from different sources, for example for tasks such as registration.