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From: "Larry N. Bolch" 
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Subject: Re: photosig/terrence
Date: Tue, 4 Feb 2003 14:08:38 -0700
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chris.kenward{at}fanciful.org wrote:

> I always try and ensure my photos are as sharp as possible, without
> giving them the 'halo edging' so characteristic of over sharpening.
> Collected framed copies of some of my recent wildlife pictures on
> Saturday and must say that the sharpening doesn't spoil them at all,
> from where I'm sitting.

If you have the full version of Photoshop and do your sharpening in Lab
Colour Mode, much of the halo disappears.

Go to Lab mode, and select ONLY the Lightness channel. Sharpen on a
sub-pixel level - I use a diameter of .3 - and a range between 300 and 500.

Sharpening in RGB mode, you are actually sharpening the colours themselves
which can end up with the really nasty white halo. In Lab mode, the colours
are completely separate from the luminance and it is the luminance that gets
sharpened.

larry!
ICQ 76620504
http://www.larry-bolch.com/

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