Re: [APML] smart sharpening tutorial

["Mike Cook, AF9Y" <mwcook@concentric.net>]

I tried it and can offer a few comments:

1) The photoshop action file will not run on the PC version of Photoshop 6.0.
     (This included renaming the file from .bin to .atn.)

2) After working a bit with the manual process, I cannot say that I was
    very impressed.  The basic idea is to use the PhotoShop's edge
    detection filter as a mask for the sharpening.  I did not like the
    resulting extra sharpening of the already sharp boundaries.  I did
    not try it with an astrophoto but I suspect it will make the star
    edges too sharp.

3) There may be a case for using this technique if you combined
    it with light masking so that edges in the brightest areas of
    the image would not be additionally sharpened.

By the way, I'm curious if anyone has use the NikSharpener and
has an opinion to share.









From:           	Herm <hermperez@worldnet.att.net>
To:             	astro-photo@seds.org
Subject:        	Re: [APML] (fwd) filmscanners: smart sharpening tutorial
Date sent:      	Sun, 23 Sep 2001 13:18:32 -0400
Send reply to:  	astro-photo@seds.org

> any of you photoshop gurus could give us a report on this new method?, is it any
> good for us?..
> 
> Herm <hermperez@worldnet.att.net>  wrote:
> 
> >Anyone scanning negs may be interested in a 'smart sharpening' tutorial I
> >wrote which shows how it is possible to sharpen aggressively without
> >introducing noticeable artefacts. The tutorial includes a downloadable
> >Photoshop action.
> 
> Herm
> Astropics http://home.att.net/~hermperez
> 
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> 



Mike Cook, AF9Y
http://www.webcom.com/af9y
mwcook@cris.com




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