Edge detection

Imagine looking at a picture with lots of different colors and shapes, like a landscape. Sometimes we want to find the edges of the shapes in the picture, like the line between the sky and the mountains. When a computer looks at a picture, it sees it as a bunch of tiny squares called pixels. Edge detection is like a way for the computer to find where the edges between colors and shapes are by looking at the differences in brightness or color between neighboring pixels. This helps the computer figure out where to draw lines to show the edges of the different parts of the picture. It's kind of like how you can see the edges of things by looking closely at where one color or shape stops and another one starts.