Danbooru-based image board with a specialization in high-quality images.
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I scanned this fast and dirty, and most importantly, non-damaging to my book. But I get that this site is quality sensitive. So, is it acceptable or just a waste of time? I'm not changing either because I don't want to damage the book, I wouldn't scan the whole thing anyway, and anything higher than 300DPI takes forever on my system :D

The only image editing done here is "crop."
For the most part cheese, your scan has a little bleed through and isn't as bad as the hyakko scan... the one that was criticized, and rightly so, for poor scanning. Yours, at least, can be fixed.
don´t worry i aprecciate that you did it
I don't know much about scanning, but I've heard that the best way to minimize (or perhaps even avoid) bleedthrough is to put a black piece of paper in back of the scanned page. Is this true?
bunnygirl said:
I don't know much about scanning, but I've heard that the best way to minimize (or perhaps even avoid) bleedthrough is to put a black piece of paper in back of the scanned page. Is this true?
anything is fine..as long it's dark and uniform.
It's not a waste of time if you're looking for feedback. This mostly just needs some editing. Here's what I did, in PS (post #53004):

- Straighten it a bit. Ruler tool, line it up against the bottom colored edge (since we have a clear edge there), Image -> Rotate canvas -> Arbitrary and press enter. This isn't the most important step, but rotating loses some sharpness, so I usually do it before filtering (and always before downscaling, if any). That creates empty spots near the edges that don't quite match the white of the page, which I just cropped out.
- Get rid of the screening and moire. Greycstoration, amp 40, sharpness .6, aniso .4, alpha 1, sigma 1.
- There's a bit of moire left. Surface blur, radius 3, threshold 5 (very light).
- Crop off the shadow/blurred part on the right. It might be possible to adjust the brightness, so less of the image needs to be cut off, but I havn't found a good way to do that. There's not much going on there and all we end up losing is a bit of the green shadow. Some images have more significant stuff near the edge, and cropping it isn't good. Some people do have tricks to reduce this problem when scanning without debinding a book...
- Adjust levels. (Forgot about this, since levelling hasn't been part of my workflow for a while...) I just used Image -> Adjustments -> Auto Contrast (never Auto Levels). I don't have the original page, so I can't tell how close it actually is, but the colors are a lot more clear this way.

The filtering is a bit strong, because it needs to remove the moire (those horizontal lines) in addition to the screening. This happens because 300 DPI is too low for this page; the result is a bit of overfiltering, but it's not bad. There's a bit of shadow left after cropping (since I didn't want to crop any more than I did), but it's a lot less noticable.

This doesn't take long once you get the hang of it; other than the time it took to actually run Greyc, it took maybe a minute to do all this. (Of course, I didn't spend much time fiddling with greyc settings, but the ones I had loaded at the time did a reasonable job.)
bunnygirl said:
I don't know much about scanning, but I've heard that the best way to minimize (or perhaps even avoid) bleedthrough is to put a black piece of paper in back of the scanned page. Is this true?
true.
and more importantly, adjust levels by hand not using auto. if it comes to a kind of thin books, auto levels never works correctly.