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Originally Posted by Adam B.
I've scanned it as a black and white document at 300dpi. I'm not very impressed with the quality (see screenshot). The illustrations don't look very good, and there are random black dots around the page. In addition, the text doesn't look very clean.
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What scanner are you using? What kind of scanning is it intended for? If it's a photo scanner, you should probably not try bilevel scans at 300 dpi.
Anyway, do not let the scanner do the processing (in your case contrasting and thresholding). Instead you scan, say, in greyscale, and then separately do whatever smoothing and sharpening you need before you reduce sampling rate and final thresholding (Photoshop, PaintShop Pro, etc.). That way you avoid scanner firmware problems.
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I have a plethora of options and formats I can save it into directly from the scanner (PDF, TIFF, etc). The pages are also very thin, so if I scan it as a color document (and greyscale, probably), the back side will bleed through.
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The best approach for thin pages is to insert black paper 'behind' the scanned page -- that lessens any reflected light picking up the printing on its other side. It takes a lot of extra work, but if you want high quality you won't mind working a bit.
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Has anyone else scanned a book like this with good results? What settings/format did you use?
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I don't think settings are relevant without knowing what scanner you have.