Legacy ImageMagick Discussions Archive

Changing the filetype to png did the trick, even without the "-channel rgba" part. The exact same command with an output.jpg ends up with a histogram with lots of colors while output.png ends up with a histogram of exactly two colors (#000000 and #1A1414) as I wanted. Thanks. This is actually CentOS ...

I'm sure I've missed something obvious, but I've reread what I believe to be the relevant sections of the documentation several times and can't see what I'm missing. I want to remove all colors except one from an image. I'm not looking to make use of or retain any geometrical information, I simply ...