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> I've just started making the transition to "hybrid" digital photography,
> scanning slides using a Canon FS4000US scanner, processing the images in
> Photoshop 6.0, and outputting them to an Epson Stylus Photo 2000P printer.
> One problem I'm experiencing is that in slides where there are continuous
> gradations in tone from darker to lighter--say a clear sky that varies from
> a rich, deep blue at the zenith to a lighter blue towards the horizon--the
> output shows subtle bands of color rather than continuous tonal variation.
> Are there ways to address this problem, or is this more or less what one
> should expect given the limitations of the scanner and printer I'm using?

Are you storing the images in JPEG format?

The banding of color is probably due to the lousy
compression used in JPEG/JPG format. If you store
the images using a loss-less compression format,
such as TIFF, you won't have this problem. Unless
you are using limited colors palette (such as 256
system colors palette).

The color band is caused by the image format,
trying to save space on compression, so it remaps
closely related colors to a single color.

Chieh

--
Chieh's Web - http://Chieh.CameraHacker.com/


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