Comment by adolph

> If I want to find duplicates, it will be impossible if the filename changes.

Depends on what is meant by a "duplicate." It would be a good idea to get a checksum of the file, which can detect exact data duplicates, but not something where metadata is removed or if the image was rescaled. Perceptual hashing is more expensive but is better distinguish matches between rescaled or cropped images.

https://en.wikipedia.org/wiki/Perceptual_hashing