dpc wrote:Then put another black sheet under the page you're scanning to eliminate the bleed through.
o3h1p wrote:@dpc Yes I did the black paper test (with a single page on a flatbed) and it does help equalize the bleed-through so that it's easier to remove post processing. The problem with this is that it would be a lot of work to move two sheets of paper around for each page. I'm still hoping that with the right settings/lighting I can get better output. But it might just be the case that any sufficient bright light will make it bleed through.
heelgrasper wrote:That isn't going to eliminate the bleed through since that comes from the print on the other side of the same sheet.
dpc wrote:One idea that I've been toying with is to do a post-process operation with the a scanned page, and the image from its back side. You'd perform a blend operation between the two pages that would subtract a percentage of what is on the back side image from what is on the front. Proper registration of the two images is a bear (they come from different cameras), but the early results show some promise.
spamsickle wrote:I would say that the black piece of paper under the page you're shooting would be the correct solution to the ghosting problem, rather than attempting to subtract the ghost image in software. Aside from registration problems, you're going to have to consider the front image as well - the back-page image will not show through dark areas of the front image, so simply subtracting a percentage will not work. The back-page image is not showing because the ink bled through the page, but because the light shone through the page and bounced back. Letting it bounce off a uniform black surface should eliminate virtually all of the back-page ghosting.
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