Searching images used in two different pages of objects

The FAQs about pictures of objects
https://en.numista.com/help/picture-obverse-reverse-and-edge-129.html
https://en.numista.com/help/picture-obverse-reverse-and-watermark-172.html
say that If several objects share an identical face, do not reuse the same image for multiple pages. Photos should belong to that specific type.

But every now I find the same image in two (or many) pages. As referee, recently a contributor sneaked the same obverse in two pages. Fortunately, I detected this (but after validating the page) and told to the contributor that must upload a own image or I removed it. I am waiting.

The suggestion is that when the contributor uploads an image (obverse, reverse, edge or watermark), the system search the same image in the server, and warn in it is a duplicate.

Also, the system could search for duplicate image files (of validated pages) in the server and display these pages in the improvement hints page of the referee area.

Using Numista's image search?

rsirian1

Using Numista's image search?

I do not want to look for possible duplicates of each image uploaded by the contributor (by other hand, the image search find similar images, not just exact images).

I want the system do it.