Lightroom: find duplicates

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Wish Lightroom could do a bit more robust job of finding duplicates. It only seems capable of finding duplicates upon import, and even then only checks file names. It could be checking checksums, or it could even be analyzing the image itself to see if images have similar color information. Granted, this latter option would lead to a lot of false positives, but it would be helpful in weeding out dupes.
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Andrew Stutesman

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Posted 7 years ago

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Rob Cole

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Adobe has marked "find similar images" feature as "under consideration".

That said, I'm not sure why the ability to find identical images did not use checksums, as you suggested - that seems like a really good idea. Such checksums already exist for DNG and if kept for all other file-types too could be used for both duplicate detection and image integrity/corruption.
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Bryn Forbes

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I suspect they might not be adding generic checksum support for all file types because they are still hoping we'll all convert our files to DNG. It's easy to mark that feature as workaround available. I don't convert to DNG because I like to verify my backups in the field that the raw files match the backup raw files, and also save the processing time while I'm on the mood. Doing it later means I have to deal with cleaning up all the original raw files or keep another backup set.
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Rob Cole

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I think you might be right: they're tryin' to add reasons for converting to dng, not take them away ;-}.