How can I detect duplicate photos when the image dimensions differ?
Asked 12/17/2018
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2 answers
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I’m looking for a reliable way to identify whether two or more photos are actually the same image, even if they have been saved at different sizes. Ideally, I want a tool or method that can distinguish exact duplicates from images that are only similar.
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
7y ago
2 Answers
2
I am going to steal @osullic comment.
If so, I have used VisiPics (on Windows) to do what you want.
I have tested it a bit and it is doing a decent job. It is a really small application for windows. It can be improved a lot, but it works.
It marks as green if it feels it is an exact duplicate, and some other colors like orange if it is just similar.
Another option: duplicate-finder.com It assumes the bigger file is the original, but it makes a good job.
This two, unfortunately, seems to be discontinued.
Another that does the job is pixiple.
There are some other alternatives, which I still need to test. https://alternativeto.net/software/duplicate-photo-finder/
Originally by user37321. Source · Licensed CC BY-SA 4.0
user37321
7y ago
0
Generated from our catalog & community — verify before relying on it.
Yes. If the images may be resized, a simple file comparison won’t work, so you’ll want duplicate-photo software that compares image content rather than just filename, file size, or pixel dimensions.
From the community suggestions, tools such as VisiPics can do this: it flags exact duplicates separately from photos that are only visually similar. Other mentioned options include duplicate-finder.com and Pixiple, though some of these appear to be discontinued.
In general, the reliable approach is to use an image-similarity or perceptual-hash based duplicate finder. These tools are designed to recognize the same photo even when resolution or file size changes. Keep in mind that no method is perfect: resized copies are easier to match than photos that were heavily cropped, edited, or recompressed.
So the short answer is: yes, but use image-aware duplicate detection software rather than direct file matching.
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