Homography

Homography is like playing a puzzle game where we have two pictures with some objects in common. Imagine you have a picture of your house and another picture of your friend’s house, and both pictures are taken from different angles. To compare these two pictures, we need to put them in the same perspective, as if they were taken from the same angle.

This is just like trying to put together two puzzle pieces of the same object that were cut differently. We need to rotate or stretch one piece to make it fit perfectly with the other piece.

In the same way, we need to transform one picture of the house to match the other picture of the house. This is where homography comes in.

We basically use math to find the exact way to transform one picture so that it matches the other picture of the same object. It's like finding the specific stretching or rotating angles that will make two puzzle pieces fit together.

Once we find the correct transformation, we can use it to compare the two pictures, even though they were taken from different angles. This is really useful for many things, like making 3D models or for identifying objects in images.