On Mon, Jan 23, 2017 at 12:58 PM, Laxminarayan Kamath <kamat...@gmail.com> wrote: > Hi all! > > While you guys are at it, I encourage you to try out this formula: > > E = (2 * I ) - M > > I call it the "Opposite" mode. I derived it from how the unsharp mask > does the sharpening - first run a grain extract and then do a grain > merge. > > It is not useful in an awful lot of places. But when you want to > de-convolute in a strange way, and you have the procedure or a plugin > which does only the convolution, "Opposite" layer mode can help you > get there quickly!
This is similar to something else I have experimented with, permitting opacity values below 0% and above 100% for normal mode, this permits implementing unsharp mask with a blur layer - as well as increasing saturation by blending a color image with it's desaturated variant. /pippin _______________________________________________ gimp-developer-list mailing list List address: gimp-developer-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-developer-list List archives: https://mail.gnome.org/archives/gimp-developer-list
