If you paste this syntax in Gimp's GEGL Graph filter you will be able to test solarization effects I made. I have no interest in transforming them into filters with GUIs as they are frankly generic. Unless of course someone shows high interest in them. In that case tell me and I will transform them into filters of their own. All of this syntax will work regardless if you have any of my plugins.
Color Solarization previewAttachment:
purple_solarization.png [ 505.42 KiB | Viewed 3201 times ]
Invert Solarization PreviewAttachment:
invert_solarization.png [ 449.4 KiB | Viewed 3201 times ]
Technical Solarization based on the original definition id=1 dst-in aux=[ ref=1 gegl:svg-luminancetoalpha ]
invert
gray
id=2
gimp:layer-mode layer-mode=burn aux=[ ref=2 opacity value=0.6 gaussian-blur std-dev-x=1.5 std-dev-y=1.5 ]
dst-over aux=[ ref=1 ]
id=1 dst-in aux=[ ref=1 gegl:svg-luminancetoalpha ]
invert
id=2
gimp:layer-mode layer-mode=burn aux=[ ref=2 opacity value=0.6 gaussian-blur std-dev-x=1.5 std-dev-y=1.5 ]
dst-over aux=[ ref=1 ]
Look for the "hue" slider and modify its values.
gegl:shadows-highlights
highlights=50
shadows=50
radius=50
id=1 dst-in aux=[ ref=1 gegl:svg-luminancetoalpha ]
hue-chroma hue=44 chroma=-1
invert
id=2
gimp:layer-mode layer-mode=burn aux=[ ref=2 opacity value=0.4 gaussian-blur std-dev-x=1.5 std-dev-y=1.5 ]
dst-over aux=[ ref=1 ]
Look for the color-overlay value=HTML code and change its parameters to be any color.
gegl:shadows-highlights
highlights=50
shadows=50
radius=50
id=1 dst-in aux=[ ref=1 gegl:svg-luminancetoalpha ]
invert
id=2
color-overlay value=#ff0093
gimp:layer-mode layer-mode=burn opacity=0.5 aux=[ ref=2 gaussian-blur std-dev-x=3.5 std-dev-y=3.5 ]
over aux=[ ref=1 opacity value=0.6 ]
opacity value=7
median-blur radius=0
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