derangedhermit said:
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The key question on the # of shades is why 31 shades for 256-indexed? It's fine if you know why, I just wanted to point it out.
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I didn't know, but I do now. That happens if I use Median Cut algorithm to go to 256-indexed. I must have clicked that by mistake, I usually don't use Median Cut, but use Octree, which gives a larger file but better color extrapolation, I think. If I use Octree, the number stays at 221, same as original file.
@Jellby--
The improvement to the aliasing is impressive!
Thank you so very much. I never knew that, in fact I understood just the opposite. A long time back on the PSP forum, they told me if I got settings wrong (contrast, recoloring, etc etc) to UNDO and then use the desired settings, and not to repeat the adjustment a second time with new settings to correct the error. I just *assumed* that applied to re-sizing as well. I am so happy to find that was incorrect. (I really do need to get out more, and start getting more educated about image-editing.)
PS -- here is "21-better" compared to "21-BetterWithBlur". Adds a Gaussian blur of lowest possible setting of .5, which does improve it even a bit more, but increases the file size by 1/3. From 297kb to 399kb.