RT,
Camera photos to the same position, for example, get two photos, how to do compared to calculate the similar both of it?
Because there may be something over the camera lens, so is the same images may also may be not the same, I want to use the program to different images,

I found it on the Internet using opencv library has a contrast function and algorithm, don't know way, and there is no better and faster way, experienced a great god, please answer, thank you