[sane-devel] Color alignment Snapscan 600

[Steve Underwood]

Maier Gerfried wrote:

> I just tried out the current CVS-version of the snapscan-backend.
> The color alignment of the Snapscan 600 is a greatly enhanced since the
> last release!
> 
> I scanned a small image with my Agfa Snapscan 600 at 600 dpi and in my
> oppinion the image would look a bit better if the yellow layer is moved
> one or two (maximum!) pixles to the left. (the right edge of a black
> line seems to be a bit yellow, the left one a bit blue)
> 
> If I can help you somehow whith this, please mail me.

There would appear to be something strange going on with your scanner. 
Since I fixed the major colour fringing a long time ago, the colour 
alignment error should be imperceptable. If you nudge one of the colours 
by a single pixel at maximum resolution in any direction, on most 
scanners, the fringing is very obvious. When you get it right it looks 
perfect when scanning a high contrast black and white image. Perhaps 
your scanner has a physical alignment problem.

Regards
Steve