Back at the dawn of digital photography, torture-testing JPEG images to see how much quality was lost after multiple edits/saves was something of a thing. The JPEG, after all, is a lossy compression format that sheds information to keep file sizes manageable.
Jon Sneyers resurrects the genre with this quick video demonstrating the effect of opening and re-saving an image 500 times across several compression formats (JPEG, WebP and BPG).
As you’ll see from the video, some compression formats hold up better than others, but none retain their original form as you increase the number of saves. Some undergo an oddly memorizing metamorphosis into abstract art.
It’s pretty clear, though, that the JPEG format is the best of the bunch when it comes to retaining its original form after repeated saves. Now, why you’d want to open and re-save a JPEG 500 times is another question…
[Hat tip: DL Cade]
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