Point feature matching means finding matching points between two images. It's like trying to find two puzzle pieces that fit perfectly.
For example, if you have a picture of a cat and another picture of a cat, you can use point feature matching to find the exact same spots in both pictures. These spots are usually corners or edges of objects.
The computer finds these spots by looking at the contrast between light and dark areas in the picture. Once it finds these spots, it compares them to the spots in the other picture to see if they match.
If there are a lot of spots that match, then the computer can assume that both pictures show the same thing (in this case, the same cat). This process is important for tasks such as object detection, image stitching, and structure from motion.