Correspondence problem

Imagine you have two pictures, one taken from the front of a car and one taken from the back. Now, the problem is to match the objects in the two pictures, like the car's wheels, doors, and windows, so that you know which object in the front view is the same as which object in the back view. This is called the correspondence problem.

It is like a puzzle. But instead of putting together pieces that fit like a jigsaw puzzle, you have to match up the objects from one picture with the objects in another picture.

But sometimes it's not so easy because the pictures might look different due to lighting, angle, or other factors. So, you need to use clues to figure out which object in the front picture matches which object in the back picture. These clues could be the shape, size, or position of the object.

Scientists and engineers use math and advanced algorithms to solve the correspondence problem, to develop technology such as self-driving cars and robots.