merge

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 ).

To slice and merge images

Giuseppe — Sun, 22 Mar 2009 15:09:59 +0100

Slices and joins scriptfu is useful when you want to split one image 'file' into smaller 'files', and to recombine it successively. One single image 'file' can be split into unlimited number of files. Image-slice script save on the file imagename.rcm all the data for the reconstruction.
For more information ..

Example

Merge Visible with Layer Mask & Alpha

Snake-Arsenic — Wed, 27 Aug 2008 05:59:49 +0200

Merge visible using the active layer transparency to create a mask, visible layers below are discarded.

This can be useful in 3d applications to preserve texture maps that belong in the alpha channel by using the bottom layer's mask to hold the information.

Appears in /Image/Merge Visible with Layer Mask & Alpha of the Image window.

gimp-plugin-astronomy

georg298 — Tue, 25 Mar 2008 12:14:06 +0100

A set of plugins and scripts for astronomical image processing

Not intended for scientific image processing, due to gimp's 8bit depth restriction (for "pretty pictures" only).

News:

31.07.2008: gimp-plugin-astronomy-0.6
29.06.2008: gimp-plugin-astronomy-0.5
25.03.2008: gimp-plugin-astronomy-0.4

Plugins:

Align layers using center of brightness or 2D (fourier) cross correlation or gauss fit, subpixel-resolution, with de-rotation!
Merge layers using different mean values, including arithmetic/geometric mean, median, and arithmetic mean of x sigma around median.
Create a background gradient (artificial flat field) from a layer by fitting a 2D 4th order polynom through pivotal points. Cut out large bright nebulae to avoid wrong pivotal point values!
Star rounding: Round longish stars (due to tracking errors...)
Create an artificial galaxy. Only elliptical galaxies yet.
Create artificial stars: Using different star distributions, splitted into background, object and foreground stars. Examples:

Scripts:

Set mode for all layers
Set brightness / contrast for all layers
Normalize all layers
Subtract dark frame from each layer
Divide all layers by a flat field
Draw border with image information