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This has more value than education. I wish that I could use this as an editor to put finishing touches on images so web pages go faster for people with less ban
by jart 5y ago
This has more value than education. I wish that I could use this as an editor to put finishing touches on images so web pages go faster for people with less bandwidth. Photoshop, GIMP, and ImageMagick can't do this. The quality slider is a blunt tool that applies to the whole image. It should be possible to define a quality mask, since things outside the field of view can safely be compressed more. But classic algorithms aren't good at determining what that is, plus jpeg isn't conventionally thought of as being the canvas.
- MathYouF 5y agoIt would be interesting to pair this with something like MaskRCNN or something which does semantic masking, and then be able to choose the compression levels of different masks.
- aasasd 5y ago> should be possible to define a quality mask I vaguely remember that PS's ‘save for web’ dialog actually had that.
- jart 5y agoI'm looking at both their save for web dialogs presently and I can assure you that it doesn't.
- aasasd 5y agoFrom what I remember, you could choose a layer to use as a mask for quality. However, I haven't touched PS in more than ten years, and I can't even find screenshots of versions earlier than ~CS5 from a quick search. Perhaps it was such an obscure feature than it was yanked out. I may also be mistaking this with settings for some filter or such—but I'm fairly sure it was a setting particularly for quality of something.