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petopeto
about 7 years ago
7126
Note that there's some blurring because of the warping used to fit the pieces together. Resizing and warping have an inherent blurring effect, which is effectively halving the resolution. I think the only real fix is to scan at twice the DPI; we don't scan these ourselves so there's not much we can do about it.
kiowa
about 7 years ago
10383
Blurry interpolation algorithm also blurs noise, so a little sharpening should do the trick, I guess.

But if you are already on the brink of losing high frequency components with the source (really sharp edges already), I recommend 2x upsampling before applying these warping operations.