[magick-users] Normalize improving?

[Anthony Thyssen]

Grant on  wrote...
| I just started using the normalize function to normalize my images.
| It's usually very impressive and a big improvement over non-normalized
| images.  Some of the images are worse though, especially images that
| are predominantly one color, especially red.  Is the normalize
| function being improved, or is it a static sort of a function that
| either works well on an image or doesn't?
| 
| - Grant

Before you go any further check what version of IM you are using
there was a problem with normalize (regards to point #2) below
about a year or so ago.


Their is some disscussion going on about normalize.

1/ It is implemented as a -contrast-stretch 2,99%
   That means it it will burn or loose the 2% of the darkest colors
   and 1% of the lightest.

2/ It does so uniformly across all the given channels.  That is
   by default all the RGB channels are 'stretched' by the same amount.

3/ Unfortunateally (and this is where the disscussion is) it adjusts
   the colors in terms of histogram 'bins' rather than directly
   adjusting the color values (as per the -level option) after
   determinging the colors to be stretched to the new black and white
   points.

4/ I myself am currently working on some enhancements to -level
   as detailed in the raw notes in IM Examples, colors.
   Those notes will become a re-write of that page.

What you may really want however is to look at some of the shell scripts
that Fred Weinhaus has written for image enhancement.
   http://www.fmwconcepts.com/imagemagick/

These scripts are 'proof of concent' type scripts, for posibly new
functions into ImageMagick, but in the mean time work well on there own.

  Anthony Thyssen ( Graphics Enthusiast )    <A.Thyssen at griffith.edu.au>
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  At 300 dpi you can tell she's wearing a swimsuit.
  At 600 dpi you can tell it's wet.
  At 1200 dpi you can tell it's painted on.
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                                                      -- Joshua R. Poulson
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