What do you use to find and replace identical pictures?

Question

Images

I ran into a problem:
I am filling out an online store (parsing and information from suppliers) ...
Images of goods are sometimes just a stub of a supplier (the same images), you need to identify and replace them with your own, but so that the file names do not change, i.e. . the supplier's image is called img5523.jpg, after replacing it with your own, the modified file must also have the same name.

Answer 1

this is a tricky task.
write the utility yourself via the imagemagic command line, for example, it's easy to write.

Answer 2

pHash , at the same time you can catch pictures of different sizes, proportions, with different watermarks, etc.