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Using GraphicsMagick or ImageMagick, how do I replace transparency with a fill colour?

Fresh3 days ago
Mar 15, 202611915 views
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Problem

Using GraphicsMagick, it's fairly easy to replace one colour with transparency... Unfortunately, I can't figure out a simple way to do the exact opposite. If I have an image file with alpha-channel transparency, how do I compose it on a constant-colour background then discard the now redundant alph…

Error Output

gm convert -transparent magenta src.png dst.png

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Fix for: Using GraphicsMagick or ImageMagick, how do I replace transparency with a fill colour?

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Using GraphicsMagick, should be able to replace the first two steps in your process (for ImageMagick, it'd be instead of ). I'm not sure about the third step, but it sounds like you're just running on the image from the first two steps, so the final…

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