Dan Espen wrote:
> Here it is again:
>
> I made an attempt to provide a program that automates the color
> reduction and you will find the program in fvwm 2.0.42 in the "utils"
> directory. Subsequently Romano Giannetti and Martin Kraemer
> introduced "pixy2" which outclasses my effort with a much better color
> matching algorithm. Pixy2 can be gotten from:
>
> ftp://sirio.iet.unipi.it/pub/romano/pixy3.2.tar.gz
Look for mogrify as well, it's part of ImageMagick:
mogrify(1) USER COMMANDS mogrify(1)
NAME
mogrify - transform an image or sequence of images
SYNOPSIS
mogrify [ options ...] file [ [ options ...] file ...]
DESCRIPTION
mogrify transforms an image or a sequence of images. These
transforms include image scaling, image rotation, color
reduction, and others. The transmogrified image overwrites
the original image.
EXAMPLES
[..] To create a single colormap for a sequence of bird images,
use:
mogrify -colors 256 scenes/birds.*
OPTIONS
[..] -colors value
preferred number of colors in the image.
The actual number of colors in the image may be less
than your request, but never more. Note, this is a
color reduction option. Images with less unique colors
than specified with this option will remain unchanged.
Refer to quantize(9) for more details.
If more than one image is specified on the command
line, a single colormap is created and saved with each
image.
Note, options -colormap, -dither, -colorspace, and
-treedepth affect the color reduction algorithm.
-colorspace value
the type of colorspace: GRAY, OHTA, RGB, Transparent,
XYZ, YCbCr, YIQ, YPbPr, or YUV.
Color reduction, by default, takes place in the RGB
color space. Empirical evidence suggests that
distances in color spaces such as YUV or YIQ correspond
to perceptual color differences more closely than do
distances in RGB space. These color spaces may give
better results when color reducing an image. Refer to
quantize(9) for more details.
The Transparent color space behaves uniquely in that it
perserves the matte channel of the image if it exists.
The -colors or -monochrome option is required for this
option to take effect.
ImageMagick Last change: 1 May 1994 15
Only found this after we finished pixy, and I didn't test it against
pixy. But I thought it was worth mentioning.
Martin
--
| S I E M E N S | Martin.Kraemer_at_mch.sni.de | Siemens Nixdorf
| ------------- | Voice: +49-89-636-46021 | Informationssysteme AG
| N I X D O R F | FAX: +49-89-636-44994 | 81730 Munich, Germany
~~~~~~~~~~~~~~~~My opinions only, of course; pgp key available on request
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Received on Mon Jun 03 1996 - 04:26:06 BST