Legacy ImageMagick Discussions Archive

I have an image which I want to make that image semi transparent using C api. I am currently on IM - 6.8.9-10 on unix and using wands API to do image manipulations. Please suggest how can I make my image semi transparent.

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I suggest you work out the command line that gives the result you want. For example, it might be: Then find the function you need. I don't use Wand, but the function MagickEvaluateImageChannel() seems likely.