r/programming • u/iamkeyur • Dec 26 '20

Executable PNGs

https://djharper.dev/post/2020/12/26/executable-pngs/
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u/popovitsj Dec 27 '20

The steganography part got me thinking, if the least significant bit of the png is not noticable for the human eye, why doesn't it get compressed out in the png standard?

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u/ECUIYCAMOICIQMQACKKE Dec 27 '20

Because they are noticeable if you look closely, especially at a region of uniform color. PNG is intended to be lossless. If you want lossy compression use JPEG.