GIMP Plugin Registry

Texturewerke is texture creation tool for GIMP.

It has two operating modes - color adjustment and highpass filter. More information can be found at Khayyam development page

Color adjustment  read more »

The plugin selectively blurs the color information (both hue and saturation) in image. There are two basic scenarios / reasons to use this: When saturating poorly saturated images and denoising noisy images. The plugin blurs selectively, and can even "sharpen" transitions between two colors.

The plugin have thee basic outputs - blur color on image, creating mask with fixed brightness (use hue mode for the layer afterwards) and Subordinate brightness blurring (see wiki link for explanation).

Location in gimp: FILTERS -> BLUR -> COLOR SELECTIVE BLUR  read more »

This plugin creates fancy/colorfull/surrealistic images from photos.

Visit http://code.google.com/p/rainbow-tonemapping/wiki/Introduction for a bit more theory and examples

This plugin changes the color temperature of an image via shifting it in the YUV color space:
http://en.wikipedia.org/wiki/YUV

Compile and install it with:
$ CC="g++ -O2" gimptool-2.0 --install elsamuko-temperature.c  read more »

This is my first script-fu plugin. It is an adaptation of 3 different methods for muting the colors in an image.  

1. A simple copy of the existing layer, desaturating it with luminosity, and setting opacity over the original.

2. One of my methods for producing similar results as described by the originator (Flickr user Tennessee_Gator):

http://www.flickr.com/groups/photoshopsupport/discuss/72157594475266866/  read more »

Saturation equalizer is saturation plugin that can adjust saturation of an image via 6 sliders – effectively the saturation curve. You can alo modify brightness of image with two spinboxes – they work like „levels“ tool.
Additionally you can autoalign RGB channels to eliminate color cast and there are few more features. I believe they are self-explanatory, once you work with plugin.
It internally works in floats, that means no information is lost during processing.
Plugin is multithreaded.  read more »

This script
1)adds alpha channel to active layer,
2)splits active layer into RGBA,
3)converts each layer to 4-bit grayscale w/ FS dither, then
4)recomposes it.
End effect is that images are "Dithered" to 12-bit color + 4-bit transparency (ARGB4444/4096colors).
The higher-depth dither is especially useful for mobile developers who need to pre-dither
assets for 12-bit screens.

Version 0.1 Initial Version - No frills, barely works.

Please email me for any issues... I'm pretty swamped, but I'll try to address!

INSTALL:
Copy the 12bit-dither.scm file to your scripts dir.  read more »

OK - so I saw this plugin today:
Cross Processing (Xpro) http://registry.gimp.org/node/25007
Which is based on this excellent tutorial by jEsuSdA: http://www.jesusda.com/blog/index.php?id=375

After running through the tutorial, I decided to write another version of the plug-in with a few options.

This plug-in requires Python. If you have the 'Filters->Python-Fu->Console' menu item you are all set. If not, install Python support for GIMP.
The plugin can be found under Filters>Artistic>Cross-Process. Don't forget to make the plugin executable.

Options:  read more »

[updated 11/28/2011 be 2.7 compatible- A HUGE thank you to François Collard for providing the update.]
Another simple, but I hope useful, color toning automation script designed to assist in adjusting flesh tones in portraits. It doesn't do anything that you couldn't do on your own a few other ways, but if you like fiddling with the complexion of subjects in portraits, and like me, you are a tad lazy, you might find it helpful.  read more »

This plugin calculates the color curve from two different pictures (Original and Modified).
Build and install it with:
$ gimptool-2.0 --install elsamuko-get-curves.c  read more »