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> Gradients don't provide enough change to see the edges between colors. You can see it on a computer screen because the screen amplifies the contrast of the im
by bscphil 7y ago
> Gradients don't provide enough change to see the edges between colors. You can see it on a computer screen because the screen amplifies the contrast of the image (another old lesson I eventually had to relearn so as to compensate when making prints of digital photos).
> Nobody knows what resolution you print things when they see the print.
Well sure, you're right about the gradient thing, but what if you have an image with some really sharp, contrasted edges?
Just anecdata, but my family and I were walking through a seasside town a while back and ended up in an artist's shop. Took a look at some photographic prints on the wall (going for $50-$150+, as "artisan" stuff often does), and I had to call my partner over to look at them because I couldn't believe they were all pixelated! Some of them quite badly. I was about 18 inches away from them, I guess, and they looked to have been printed at about 100 dpi. Sure, you probably don't need 300 DPI for large wall prints, but I'd rather have a margin of error and not have that happen to one of my prints. Most people aren't likely to notice flaws in printed images, and are even less likely to tell the owner if they do.
I guess it's possible the shots sent to the printer were badly compressed JPEGs, but that seems unlikely.
- mceachen 7y agoIt not only depends on the image content, but how you send the image to the printer. Print engines can apply nearest-neighbor interpolation which results in visible, blocky pixels. If they'd upsampled the image with lanczos or another higher-quality algorithm before sending it to the printer, it would have looked like it was just a touch out of focus.