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. |
Modifies an image showing only those pixels which are within the specified color range |
last modified: December 15, 2018
USAGE: locatecolors -b begincolor -e endcolor [-m mode] infile outfile
-b .... begincolor ...... first color for range of colors; any valid PURPOSE: To modify an image to show only those pixels which are within the specified color range. DESCRIPTION: LOCATECOLORS modifies an image to show only those pixels which are within the specified color range. A count of the number of pixels will be presented at the terminal. ARGUMENTS: -b begincolor ... BEGINCOLOR is the first color used to specify the desired range of colors. Any valid IM opaque color is allowed. -e endcolor ... ENDCOLOR is the second color used to specify the desired range of colors. Any valid IM opaque color is allowed. -m mode ... MODE specifies how the ranges of colors are to be combined into a mask. Choices are: "and" or "or". If "and" is specified, then the mask will be created only where the channels overlap. If "or" is specified, then the mask will be created from the sum of all the channel ranges. The default=and. Note: the channel ranges will be manipulated in 8-bit colors to create the mask. 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 the case of mode="and".
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