It appears the GIMP dependency is just so you can build the GIMP plug-in.  It appears to use (the same author&#x27;s) cimg to do the heavy lifting.  (<a href="https:&#x2F;&#x2F;github.com&#x2F;dtschump&#x2F;CImg" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;dtschump&#x2F;CImg</a>)