On Fri, 6 Aug 2004 19:15:28 -0700, Winsor Crosby <wincros@xxxxxxxxxxx>
wrote:
>
> From the bythom.com site:
>
>
> Using Sharpening to Change Contrast
>
> Here's something I hadn't noticed before. Then one day I made
> accidentally entered some "stupid" values into the Unsharp Mask filter
> and noticed a change to the image that was interesting. So I did some
> research. It seems that a number of digital cogniscenti have been using
> the Unsharp Mask to make slight bumps in image contrast. It's really
> quite simple to do: just select a low value for Amount (10-25%), a very
> high value for Radius (200-300 pixels), and a 0 Threshold. This
> technique actually produces a more likeable contrast boost, in my
> opinion, than does the Contrast command. Just be sure to save a version
> of your image before using this technique (it's not undoable at a later
> date). You also perform this action prior to doing a "real" sharpening.
this very high radius value is only for super sized files, right? if i do
that on a 640 pixel wide JPG, it looks awful (but 20% 2pix and 0thresh
looks good at 640*480 size)
--
/S
aim:iddibhai
icq:104079359
email/msn:msidd004atstudentdotucrdotedu
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