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TIFF, I believe? https://en.wikipedia.org/wiki/TIFF https://en.wikipedia.org/wiki/TIFF
by NikolaNovak 6y ago
TIFF, I believe?
https://en.wikipedia.org/wiki/TIFF https://en.wikipedia.org/wiki/TIFF
- sigio 6y agoThere are lossless versions of PNG, BPF and there is also a lossless JPEG enhancement.
- mceachen 6y agoPNG is always a lossless format. You can only control the level of compression. There are tools that let you re-encode a PNG after applying a lossy filter, but the PNG still encodes it losslessly.
- mceachen 6y agoTIFF is just a image container. I'd make sure when you save as TIFF, you specify a bit depth equal to your source image, and a format that isn't lossy (like standard JPEG). If you've got a standard sRGB 8-bit-per-channel image, though, the loss from JPEG at q95 or q100 is negligible, and means your image still enjoys wide app compatibility. If it's something else (like a raw format from a DSLR), the best you can do is retain the original file. Also: don't forget file metadata! I inadvertantly deleted all EXIF headers from a number of my original images many years ago because I used jpegtran (without the -copy option!) to losslessly rotate images. I ended up adding a bunch of heuristics in PhotoStructure to automatically infer missing metadata to repair this mistake.