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I've usually used Quantum Mechanics to clean up CCD noise after a scan (or
a digital camera). I've also used Gaussian blur on the a and b channels of Lab
colorspace (depending on which shows the most noise) to smooth things out.
david
> >>Blue light sensitivity of the CCD is less than for other colors, meaning
> more amplification and lower signal to noise ratio in this channel.<<
>
> I've been able to reduce noise (graininess) a little by applying a slight
> gaussian blur to just the blue channel. It's subtle but evident and helped
> clean up some skin tones.
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