Re: [APML] Histograms

[Joe Pedit <pedit@email.unc.edu>]

Alan Voetsch wrote:
> 
> Hi all,
> 
> As I've been playing around with Photoshop stuff:
> contrast/brightness; hue/saturation; color balance;
> levels; and curves, I've noticed the histogram changes
> from what looks like the silhouette of a hill, to
> something that looks like a picket fence if the pieces
> of wood were placed about an inch apart and viewed
> from about thirty feet away. In other words, lots of
> steep, narrow spikes. The images are improving, but is
> this what I want?
> 

Alan,
You can minimize the picket fence histogram if you do the majority of
your image enhancement with your scanner's software.  Jerry Lodriguss
has a description of what you observed at
<http://www.astropix.com/HTML/J_DIGIT/COMPEXP2.HTM>.  I can't help you
with a step by step description of Photoshop techniques -- I'm still a
hack after five years.
Joe

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