Are there any open source image recognition libraries?

Question

Images

Briefly the essence of the problem:
There is a database of images, for example 3k jpg files. These images have the same background, and on the background there are different objects, round, square, all sorts and in different places .. 1, 2, 3 objects
each.
There is a library for face recognition, so I'm looking for something like that ..
Tell me, who has met something similar on the network?
Thank you.

Answer 1

OpenCV is fine.