I want to convolve an image with a kernel that is another image. The GIMP G’MIC “Convolve” filter provides an input field “Custom kernel” but it is not an image. Moreover, that’s the only filter that the search returns for “convolve” (other than “deconvolve”).
When I went to learn how to write my own filter, I ran into an error in the documentation for Windows preventing me from doing so.
Isn’t there some existing filter that does what I want?