Blob detection

Blob detection is a way to find shapes in photos or videos. It's like a game of "Where's Waldo," but instead of looking for a person, you're looking for any blob - a blob is just a shape or an area of darkness or brightness in an image. To detect a blob, computer software looks through an image and looks for areas that are different from the others. When it finds a blob, it marks its position and size in the image. So, if you are looking for a square, the computer will look for parts of the image that look like a square. When it finds one, it marks its position and size in the image.