Pierre Willenbrock schrieb: > > Now for the real reason i am answering: I did play around with my > scanner, trying to get the shading calibration to work only on the white > strip. The trick was to do a real scan over the white strip, not just > sampling a single line over and over again. This is how it is done for > the gl646 side, but i did disable that in my test-version because it led > to fewer changes. For the LiDE 35, normally this is done, too, but over > the full calibration area, which contains a white and a black strip. > (That way, i get the white and black shading data in one scan. > Obviously, this is only possible when there _is_ a black strip.)
To clarify this, my patch (and probably your code base) does a scan over the strip, too.