On 19/05/2009 10:19, Ryan Marshall wrote:
Don't know if you've tried this, but I find if the image is original a 'line drawing' - ie. there hasn't been a use of grayness to show detail, and instead hashing or line patterns are used (like most LW illustrations) you can get very quick 'cleaned' results by just jumping the contrast and brightness up - it'll 'remove' the page texture and darken all the features. THEN I reduce the colours to B&W if needed.
Yes, I had a play around with the scans Ryan sent, and I came to the same conclusion. After using the perspective tool to straighten the image, adjusting the Brightness/Contrast to +20/+70 achieved very good results to my eyes, with very little loss in detail. This then scaled nicely to 386 x XYZ (keeping the original aspect ratio) and then dropped to 16 colours without looking shabby at all. I only mention it because it seems to be a bit faster than your patented method, Jon; but I can't vouch for whether it produces better/similar/worse results.
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