OpenCV 4 with Python Blueprints - Second Edition

Looking at feature detection

In computer vision, the process of finding areas of interest in an image is called feature detection. Under the hood, for each point of the image, a feature detection algorithm decides whether an image point contains a feature of interest. OpenCV provides a whole range of feature detection (and description) algorithms.

In OpenCV, the details of the algorithms are encapsulated and all of them have similar APIs. Here are some of the algorithms:

• Harris corner detection: We know that edges are areas with high-intensity changes in all directions. Harris and Stephens came up with this algorithm, which is a fast way of finding such areas. This algorithm is implemented as cv2.cornerHarris in OpenCV.
• Shi-Tomasi corner ...