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[OM] Re: USM test re PWP/PS is up

Subject: [OM] Re: USM test re PWP/PS is up
From: Tris Schuler <tristanjohn@xxxxxxxxxxxxxx>
Date: Sun, 08 Feb 2004 10:16:50 -0800
Chuck, please send along a test image and another with this PWP filter 
applied to that test image. I'll then run IS on the sample and mount the 
two resultant sharpened images (including your PWP job) as a couple of A-Bs 
per the USM test on my site.

Within certain bounds (it's impossible to be sure the "same" degree of 
treatment has been applied, you realize that of course) we'd then know more 
about it.

On its face that sounds more refined than what I saw in the PSP v8 demo, 
which, as I recall, was basically the same filter used for v7 of that product.

Tris

At 08:24 AM 2/8/2004 -0500, you wrote:
>Whether as good as Miranda's IS plug-in I haven't a clue but PWP's
>advanced sharpen function is not a shotgun approach.  In addition to
>much more precise controls for radius and amount it also contains a
>histogram and slider controls that:
>
>"...lets you perform selective sharpening by including only those
>neighbor pixels in the computations that differ by more than a given
>threshold amount from the pixel you are sharpening."
>
>The histogram allows you to identify smooth color, edgeless areas such
>as sky that should not be sharpened.  You can also choose to sharpen
>only luminance and leave the chrominance alone or to sharpen under
>control of a mask.
>
>For more detail go to: <http://www.dl-c.com/Temp/> and download the
>"Advanced Sharpen" pdf white paper at the left side of the page.
>Once again, I don't think it's better.  Just a good deal at USD 90.
>
>Chuck Norcutt
>Woburn, Massachusetts, USA



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