OpenCV SurfFeatureDetector Principles

Question

How does SurfFeatureDetector find key points ?. In other words, what qualities should be part of the image, which should be caught as a key point ?.

Answer 1

The answers to stop streams should be more than a link, but your question cannot be answered less than a good, full-sized scientific article. Go directly to the source:

Here you will find a detailed description of the algorithm. Find the "OpenSURF Library Notes" pdf.