This was my only tangible contribution to the Gimp, some twenty years ago. IIRC it was modelled after a similar feature in Paint Shop Pro, and it was easy enough an exercise for an aspiring programmer. Or so I thought: others have now spent much more time maintaining it than I spent writing it.
In hindsight it seems like a bizarre idea to have a feature whose GUI requires filling in 25 numbers. But perhaps it has use as an educational tool.
In development version of the Gimp, the entire plugin has effectively been rewritten. Good riddance!
I've been trying to get a handle on what convolutions really are. Which ever description I read is usually so abstract as to be meaningless. But your plugin is a beautiful way to play with them an understand them in a fundamental way.
N.B. I came across it because of Chris Olah's blog post .
There is no better way, if you need to specify an arbitrary matrix, than to ask for 25 numbers to be input.