Copyright © Fred Weinhaus My scripts are available free of charge for non-commercial (non-profit) use, ONLY. For use of my scripts in commercial (for-profit) environments or non-free applications, please contact me (Fred Weinhaus) for licensing arrangements. My email address is fmw at alink dot net. If you: 1) redistribute, 2) incorporate any of these scripts into other free applications or 3) reprogram them in another scripting language, then you must contact me for permission, especially if the result might be used in a commercial or for-profit environment. Usage, whether stated or not in the script, is restricted to the above licensing arrangements. It is also subject, in a subordinate manner, to the ImageMagick license, which can be found at: http://www.imagemagick.org/script/license.php Please read the Pointers For Use on my home page to properly install and customize my scripts. |
Remaps the colors in an image using a 3D color distance metric relative to a color table map image. |
last modified: December 15, 2018
USAGE: remap [-n numcolors ] [-m metric] [-s] infile mapfile outfile
-n ... numcolors .... desired number of colors, if the input image PURPOSE: To remap the colors in an image using a 3D color distance metric relative to a color table map image.
DESCRIPTION: REMAP remaps colors in an image using a 3D color distance
metric relative to a (map) color table image. The mapfile is an image
that contains only the desired output colors. The infile should contain
a limited number of colors, less than or equal to 256. However, it may
take a long time to process with 256 colors and generally will not
more produce results much different than much fewer colors, certainly
no more colors than are in the mapfile.
ARGUMENTS: -n numcolors ... NUMCOLORs is the desired number of colors. If the input image has more than 256 unique colors, then the image will use -colors numcolors to reduce the number of colors. Values are 0<integer<=256. The default is to use the number of input colors, if it is less than or equal to 256, otherwise 24. -m metric ... METRIC is the colorspace distance metric. The choices are: RGB or RGBL (luminance weighted RGB). The default=RGB -s ... SHOW/display textual data to the terminal
References: Limitation: The script only works for fully opaque images and map images. CAVEAT: No guarantee that this script will work on all platforms, nor that trapping of inconsistent parameters is complete and foolproof. Use At Your Own Risk. |
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What the script does is as follows:
This is equivalent to the following IM commands for metric=RGB:
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