Fred's ImageMagick Scripts
|
Automatically thresholds an image to binary (b/w) format using an adaptive spatial subdivision color reduction technique. |
last modified: October 29, 2008
|
USAGE: 2colorthresh infile outfile There are no options PURPOSE: To automatically thresholds an image to binary (b/w) format using an adaptive spatial subdivision color reduction technique. DESCRIPTION: 2COLORTHRESH automatically thresholds an image to binary (b/w) format using an adaptive spatial subdivision color reduction technique. This is the -colors IM operator as implemented with slight modification from Anthony's Examples at http://www.imagemagick.org/Usage/quantize/#two_color For algorithm details, see http://www.imagemagick.org/script/quantize.php ARGUMENTS: NOTE: It is highly recommended that the output not be specified as a JPG image as that will cause compression and potentially a non-binary (i.e. a graylevel) result. GIF is the recommended output format. 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. |
|
2Color Thresholding Of Various Images |
||
|
Pictures Were Obtained from: |
||
|
Original Image |
Thresholded Image |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
See A Comparison Of Each Image Against Each Thresholding Technique
|
What the script does is as follows:
This is equivalent to the following IM commands
|