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Rainbow tonemapping

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

YUV Temperature Plugin

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

Menu entry is Colors -> Color temperature.

Muted Colors

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/

Saturation Equalizer

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.

16-bit (was ARGB4444) Dither Script

This script "dithers" RGB images to 16-bit color, either:

ARGB4444/4096colors+16levels of transparency,
RGB565/65536colors+ no transparency, or
ARGB1555/32768colors + fully transparent or not.

The higher-depth dither is especially useful for mobile developers who need to pre-dither
assets for 12-bit screens.

Version 0.2 - Added RGB565 and ARGB1555.

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

Cross-Process (Python version with options)

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:

CMY Skin Tone Adjust

[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.

Get Curves Plugin

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

Low Frequency Even ver 1.1 (UPDATED)

This plugin removes low frequency brightness and color differences from image. It's dedicated for creating textures for computer graphic from photos. But it shuld be usefull for other puroses too.

Manual Lens filter

This script changes the color balance and brightens up the image to imitate images taken with Manual/Classic/Vintage lenses.

Below you will find two versions of the script one with Manual lens only (manual-lens_filter.scm) and one with Manual lens and Cool Manual lens (cool-manual-lens_filter.scm). Cool Manual lens uses the engine of http://registry.gimp.org/node/28306 to cool the image.

See samples:
Original:

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