Software or a set of instructions in order to compare two files of type pdf - as a result, having received links between the "same" images?

Question

Image processing

Scan of the Catalog of Stamps - color images and descriptions thereof, and a scan of the collection. The task is to identify collections referring to the directory. Is it possible in principle? if so, what are the options?

Answer 1

Let's say ... with pdf it's more difficult to operate IMHO, let's convert everything to any convenient graphic format. What remains is the task of cropping individual brands and comparing them, taking into account the fact that people can scan with different dpi. different scanners, etc. Well, for example, Google / Yandex services. Pictures somehow looks for "similar" images, but the search result does not always give the desired one. Probably your search will hardly work better......... Will such "functionality" suit you?
ps often there is some text on the stamps, you can try to recognize it and compare it between different images, maybe this will slightly improve the "quality" of the comparison .....