Re: [Gimp-developer] Color Curves
Hi I'm on the same project as Buck Arue I know some c++ and avisynth plug-in programming but sourcecode on the level of gimp is more than i can handle i have finished a first test version of an avisynth plug-in that should apply a color curve saved from gimp to the video frames http://forum.doom9.org/showthread.php? s=&threadid=87791&perpage=20&pagenumber=2 no source, yet (unreadable mess, and to be rewritten soon) for the R curve i do "spline(R,x,y,...)" R is the pixel's original R value, x,y,... are the values form the R-line in the file, except for those which have one or both values as -1 the result is the new R value of the pixel same for G, B and possibly A now for my questions: -is my R, G and B curve handling about right? (tests say: yes) -what to do with the first line of numbers? from a quick test in gimp it seems to me it should be aplyed to R, G and B additionally to their seperate curves is this correct? if yes, which of the 2 curves should be aplyed first? and should this global curve also be aplied to A? if no, how should it be aplied? -i understand that all values must be seen as x,y- pairs and if both values in a pair are -1 the pair is ignored but what if only the first value is -1 and the other is positive? i couldn't make any sense of that and for now ignore them, too but i assume that is wrong thx in advance for taking the time to help us E-Male - Get your FREE email account at Asheville.com. http://mail.asheville.com ___ Gimp-developer mailing list Gimp-developer@lists.xcf.berkeley.edu http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Color Curves
Hi there! Please, feel welcome! The said news is that GIMP's color curve code is outdated and is begging for being rewritten, for about an year. :-( The good news, is that as you dive into it, you can also help the code in the GIMP itself. That said, the code is in app/base/curves.[ch], and tools/gimpcurvestool.[ch] Regards, JS -><- On Sunday 09 January 2005 06:13, Buck Arue wrote: > I really don't know where to begin. I am an avid Gimp user. I am > not a programmer or developer. This is my first attempt at > programming, so be gentle. > > In addition to image processing, I am also a bit of a videophile. I > am interested in porting the "Color Curve" function found in "The > Gimp" to "Avisynth" to be used for video. > > This is my first attempt at programming, so be gentle. I would > like to know where I might find the relevant source code for the > "Color Curve" function in "The Gimp"? > > Maybe I am biting off more than I can chew, but I would like to > attempt it, so any help or advice you could supply would be > appreciated. > > Thank You, > Buck Arue > > ___ > Gimp-developer mailing list > Gimp-developer@lists.xcf.berkeley.edu > http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-developer ___ Gimp-developer mailing list Gimp-developer@lists.xcf.berkeley.edu http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-developer
[Gimp-developer] Color Curves
I really don't know where to begin. I am an avid Gimp user. I am not a programmer or developer. This is my first attempt at programming, so be gentle. In addition to image processing, I am also a bit of a videophile. I am interested in porting the "Color Curve" function found in "The Gimp" to "Avisynth" to be used for video. This is my first attempt at programming, so be gentle. I would like to know where I might find the relevant source code for the "Color Curve" function in "The Gimp"? Maybe I am biting off more than I can chew, but I would like to attempt it, so any help or advice you could supply would be appreciated. Thank You, Buck Arue ___ Gimp-developer mailing list Gimp-developer@lists.xcf.berkeley.edu http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-developer
