At 10:50 AM 4/4/2002 -0800, you wrote:
>I have a 16 bit scan of a photo that's on the large side (10,000 x
>7,000 pixels), and I want to see if it benefits from sharpening.
>Photoshop seems to be unable to sharpen a 16-bit image. I tried to
>"scan from disk" in Vuescan and use the sharpening there (and also
>tried grain reduction). Vuescan may have improved these aspects of
>the photo, but the exposure and saturation went completely kerflooy
>(a technical term meaning awful). Anyone have some guidelines for
>settings for Vuescan that will apply sharpening and/or grain
>reduction, but not change the exposure, color, etc at all?
>
>If not, I'll continue in Photoshop.
>
>Vuescan for Mac OS-X if that matters.
>
>Alan
1. Photoshop Unsharp Mask filter is available and works fine on 16 bit
images. I was using it just last night on my images.
2. You don't have to scan from disk in Vuescan to be able to check the
sharpen box on the Filter tab.
3. I'm not aware that sharpening and grain reduction in Vuescan have any
effect whatsoever on the exposure or color. They don't seem to on my copy.
If you were scanning from disk using a file that was not originally saved
as a raw file in Vuescan, that could explain the problems.
Stan
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Photography by Stan McQueen
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