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how can i set one color to transparent~

https://imagemagick.com/discourse-server/viewtopic.php?t=10938

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how can i set one color to transparent~

Posted: 2008-03-31T23:23:51-07:00
by mitta
like black to transparent??

Re: how can i set one color to transparent~

Posted: 2008-04-01T06:25:05-07:00
by magick
Use a pixel wand to set the alpha channel value to transparent. The source distribution includes wand/wandtest.c which includes an example of setting the color value of a single pixel in an image.
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