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PNGs will persist because I know that they're lossless by looking at the filename. When I hit File > Save as .png, I don't have to inspect output metadata (that
by nananana9 22d ago
PNGs will persist because I know that they're lossless by looking at the filename. When I hit File > Save as .png, I don't have to inspect output metadata (that image viewers don't expose) or play around with exporter settings.
It's unfortunate that we didn't give lossless webps a separate extension. Frankly I think even saving them as .png would've better than what we have now - people roughly understand that a .png is an image without artifacts, and any self-respecting image viewer will inspect magic bytes before opening a file anyways.
- edflsafoiewq 22d agoBeing lossless is a function of the whole pipeline from an input image to an output image. The last step being encode to PNG doesn't guarantee anything about losslessness.
- xigoi 22d agoLossless means that the file encodes the exact same information that was given to the encoder. This is a property of the format.
- ZeroGravitas 22d agoYes but people add pre-preprocessor steps to image formats, like blurring jpegs or lowering bit depth in PNGs to make them more compressible.
- _flux 22d agoWell, you should enable Adam7 interlacing for nicer progressive decoding! I suppose it's not very useful nowadays as most any image will load fast, though.