[sane-devel] Canon LiDE 90

[Pierre Willenbrock]

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.