"Anders K." wrote:
> 
> I'm not sure I see why. I've never seen unwanted colors testing my patch,
> even when I deliberately lined up two clashing colors halfway between pixel
> boundries:

See the thread in p.b.i. for some arguments in that concern. 
Interpolating between two strongly different colors with convincing
results is a difficult task.  One method would be to always interpolate
via some gray (or near to gray) value, this of course only makes sense if
the difference between the two colors is fairly large.

Christoph

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