12-06-2016, 09:50 PM
First... Each time you use a general Color/level setting, you lose colors, so when I see:
Colors-Brightness 10 Contrast 5
Colors-Hue Saturation-Hue 25
Colors-Levels-Middle of Input Levels 1.15
Colors-Hue Saturation-Hue 28
Colors-Levels-Middle of Input Levels 0.70
I wonder how much color is left (See Color>Info>Colorcube analysis)(*). Also, sharpening is best done last, because it adds things to the picture that are best left as they are. Photographers who know their trade and expect to edit their photos reduce the sharpening produced by the camera...
So, before we talk about scripting, maybe we should discuss what you start with, what you want to achieve, and see if there is a better/shorter workflow?
The math doesn't work because Gimp works in a gamma-corrected space. This makes predicting outcomes quite tricky. Btw, the "gamma" is really what the middle handle of the Levels tool deals with.
(*) on a random photo of mine: 176310 colors before, 137178 after... 25% loss..
Colors-Brightness 10 Contrast 5
Colors-Hue Saturation-Hue 25
Colors-Levels-Middle of Input Levels 1.15
Colors-Hue Saturation-Hue 28
Colors-Levels-Middle of Input Levels 0.70
I wonder how much color is left (See Color>Info>Colorcube analysis)(*). Also, sharpening is best done last, because it adds things to the picture that are best left as they are. Photographers who know their trade and expect to edit their photos reduce the sharpening produced by the camera...
So, before we talk about scripting, maybe we should discuss what you start with, what you want to achieve, and see if there is a better/shorter workflow?
The math doesn't work because Gimp works in a gamma-corrected space. This makes predicting outcomes quite tricky. Btw, the "gamma" is really what the middle handle of the Levels tool deals with.
(*) on a random photo of mine: 176310 colors before, 137178 after... 25% loss..