color

Colour Match

bleg — Wed, 18 Nov 2009 07:49:16 +0100

Easily map colours from a source colour to a target colour. Very effective for matching skin tones across images or between people.

Relatively quick (but not earth shattering). It doesn't work with grayscale or indexed images. Has preview, works with selections and layers, etc. Very, easy to use, and quite useful for portraits or recolouring graphics.

A demonstration: Lenna's face is mapped to the colour of the feather on her hat. This was done by selecting a colour from her face, then selecting a colour from the feather.

If you have an x86_64 version of GIMP 2.7 on linux, bunzip2 and move the colour-match file to your plugin directory:
bunzip2 colour-match.bz2
chmod 700 colour-match (Make it executable)
mv colour-match ~/.gimp-2.7/plug-ins/colour-match

To build it type: gimptool-2.0 --install colour-match.c
You will need libgimp-dev, and libgtk2.0-dev packages if you didn't build GIMP from source.

The algorithm is based on the relative color remap plug-in by Lars Clausen ( http://registry.gimp.org/node/5442 ).

Color Spotter

juef — Thu, 17 Sep 2009 04:22:11 +0200

What is Color Spotter? Basically, it's contrast, but "centered" around a color. Another way to see it is as another "Color selection" tool: you specify an image, a kind of threshold, and it selects color that are close to the one you specified; only, Color Spotter keeps every pixel from the image, darkening the wanted colors, brightening the others.

The best way to understand is to see it in action:

Here, the selected color was from a pixel from the plantpot (beige-ish).

This plug-in was mostly an experiment for me: you could say I made it just to get familiar with programming C plug-ins in GIMP. I have another plug-in I want to make, but as it's much more complicated, I wanted to make sure I could deal with the basics first.

Suggestions welcome! Thanks for reading, hopefully this will be useful to at least one person :)

Separate Luminance

Roy Johnson — Thu, 02 Jul 2009 18:43:26 +0200

FX-Foundry/Color/Separate Luminance...

Creates two new layers: one containing the Luminance, and the other the Chroma information in the form of a Grain Merge. Optionally, it will color-enhance (maximize saturation in) the Chroma layer while still keeping it luminance-neutral.

This allows you to do noise-reduction and sharpening on the two layers separately.

Update (23-Jul-2009):
Noticed that highly-saturated colors exceed the ability of the grain-extract/grain-merge to handle without clipping the color, so I have made the excess color get folded into the luminance layer. Most of the time, it will be un-noticeable, and even when it is, it shouldn't make any real difference. If you want to be sure your Lum layer is pure luminosity, you can check Excess color on separate layer. When merging, always merge onto the Lum layer rather than merging the two color layers together.

LCh color selector

y-fujii — Mon, 15 Jun 2009 15:35:08 +0200

L*C*h (L*a*b* in polar coordinates) color selector module.

Just type "make install" to install this module (You don't need to rebuild the GIMP.) .

Sample Average Colour

ffaat — Mon, 08 Jun 2009 20:19:50 +0200

This simple plugin was created in response to a request here.

It simply samples the entire image colour, and allows you to either:
- Display the RGB or grey values
- Set the foregound colour
- Set the background colour
- Add it to the current palette (if editable)

There is a toggle to sample just the layer, or the merged image.

It registers in the Colour menu as "Sample Average Colour..." and should work for RGB, indexed, or greyscale images.

UPDATE: Version 1.1 of the script now respects image/layer transparency and selections.

-Rob A>

Palette Generator

krypt — Thu, 30 Apr 2009 15:07:17 +0200

New version:1_3
Add to palette black, gray and white by default.

New version:1_2
Save palette bug fixed.

Version:1_1
Adjust light of scheme work fine (I hope!)

It generates palette by following the harmonic schemes of color: monochromatic, complementary, triadic, tetrad and analogous.
Options:
- you can choose between the digital wheel (RGB) and the real wheel (RYB);
- you can choose whether to use the color "web safe" or not;
- you can see in real time in a preview page the combination of colors;
- you can save a Gimp or Inkscape palette.
Required python libraries: :
- GrapeFruit-0.1a3
INSTALLATION: copy file gimp_palette_generator.py to the standard place for plugins (folder "plug-ins").

See: http://krypt77.altervista.org/index_gimp.htm

60's Text Effect Script (Rev. 2.2)

PhotoMaster — Tue, 24 Mar 2009 21:12:10 +0100

This script will create psychedelic 1960's text. I created this script from my tutorial of the same name. I didn't merge the layers in the script, as I did in the tutorial, because you can change the blend modes of the different layers for different appearance.

Rev. 2.0 - added compatability for Gimp 2.4.x

Rev. 2.1 and 2.2 - Added gradient controls.

http://i26.photobucket.com/albums/c147/PhotoMasterGreg/Scriptresult.jpg

gimp-netpbm2gimp-plugins and Netpbm2Gimp

pakin — Sat, 28 Feb 2009 04:01:55 +0100

gimp-netpbm2gimp-plugins is a collection of over 200 GIMP plug-ins produced by running the source code of the Netpbm graphics filters through Netpbm2Gimp, which is described below. (Note: Think "GIMP" where the Netpbm graphics filter documentation says "PBM", "PGM", "PPM", "PNM", or "PAM".) There is a particular emphasis on load/save plug-ins for obscure graphics formats, but a number of miscellaneous and useful image filters and image generators are included as well.

Netpbm2Gimp is a tool for programmers that converts programs written using the easy-to-use Netpbm library into GIMP plug-ins. Netpbm2Gimp reimplements the Netpbm functions in terms of GIMP/GTK+ functions, thereby hiding much of the complexity of plug-in development. With Netpbm2Gimp, plug-in developers needn't worry about registering plug-ins with the GIMP core, displaying dialog boxes to request input from the user, displaying dialog boxes to present the user with status or error information, handling noninteractive usage (for the GIMP scripting interfaces), managing various GIMP data structures (images, layers, drawables, shadow buffers, the tile cache, etc.), updating the progress bar, controlling the undo stack, and performing the various other operations that are needed in the context of a graphical user interface. All of those features are handled automatically by Netpbm2Gimp.

The source code and Linux binaries for both Netpbm2Gimp and gimp-netpbm2gimp-plugins are available from the Netpbm2Gimp home page, http://netpbm2gimp.sourceforge.net/.

WebThumb

li4me — Sun, 25 Jan 2009 19:17:35 +0100

Creates a separate thumbnail of the selected image file(s), pre-pends 'th_' (color image) and 'thgs_' (grayscale image) to the filename. WebThumb takes maxPixels as the maximum size of the largest aspect of the image, and then sizes the opposite aspect to maintain the original ratio.

Color Scheme Helper for Gimp

Bart — Fri, 14 Nov 2008 09:30:44 +0100

A Python plugin that start the color scheme designer Agava for creating a new color scheme. The created color scheme can be saved as a Gimp color palette and loaded into Gimp.

Presented by area42 - Agentur & Systempartner

Download and more information at

http://my.opera.com/area42/blog/color-scheme-helper-for-gimp