How to detect number plate in vehicle deep learning?
Answers
To detect an object in an image we first study its general characteristics and how it is different from other objects within the image, general characteristics of a plate number include and not limited to:
1- plates have high contrast foreground/back ground, this is designed for humans to be able to read easily, which is a bless for a computer vision problem.
2- the shape of the plate is horizontal rectangle, the aspect ration and the size of this rectangle is standard within one country.
3- the location is normally in the bottom and middle of the car.
4- some other local characteristics, i.e. country dependent.
it is an easy task now to develop your filters and image pre-process to detect the plate.
P.S. the car plate in the second image is almost impossible to be recognized because of the camera angle.