Looking for documents for Moments and HuMoments results and their differences

I am looking for detailed docs of the results of these two functions and the differences between these two functions. Where can I find them?

are you aware of this site?


based on this, what trouble did you encounter finding the specific docs of those APIs?

I found this: OpenCV: Structural Analysis and Shape Descriptors and than Image moment - Wikipedia for HuMoments but nothing for Moments OpenCV: Structural Analysis and Shape Descriptors.

Edit: Just found: OpenCV: cv::Moments Class Reference.