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The said news is that GIMP's color curve code is outdated and is begging for being rewritten, for about an year.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

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

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