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GPL

Any version of the GNU GPL. See http://www.fsf.org/licensing/licenses/gpl.html
Should be added when you choose one of the other GPL options.

Steganography

Steganography tool to hide/retrieve text or an image in an image.
Once data is hidden in an image, one can't tell the morphed image from a bunch of others (even similar looking).

Open any image and run Filters>Steganography>Hide to specify an input text file or image[lossless]. This will hide the data within the opened image. You can then save the image as a png/bmp/lossless format.

Layergrid

This Python plugin simply can lay out all layers of an image into a grid (with the grid settings changed to reflect the old image size). And it also does the inverse, creating one layer for each grid cell in the image. This can be useful for things like a sprite sheet or glyph sheet and I didn't find anything similar.

Fit all layers to image size

Not sure if a script like this exists.
It may be useful in some cases.

Fits all layers (or 'only visible' layers) to image size.

Install script in your scripts directory
(you can see the scripts directory by going to
Edit -> Preferences
and then once the preferences windows opens,
go to Folders -> Scripts)

How to test:
* Create a new image (say: 800x600px)
* Create another, but smaller image (say 100x100px)
* Copy the small image (Ctrl+C)
* Paste in the bigger image (and create a new layer)
* Duplicate this new layer a couple of times

Some scripts fixed for 2.7 and 2.8

Here are some scripts from my scripts directory, which happened to be fixed for 2.8, either because I needed them or out of curiosity. They may be backward incompatible with 2.6. If I did the work before the authors, they can receive their good back here. I updated this package on 2012/09/09, adding some other great scripts I use daily.

Cut out 4 Pictures from a scanned image

Cuts out 4 standard pictures from a scanned image.

The use case is that you use your scanner to scan in standard photos 4 at a time, you would like to split this scanned image and save it as 4 separate files to continue work with the image processing software on. But rather than to open each image and select every single picture in the image scan this batch script is cutting out 4 photos for you.
The 4 pictures will have the same filename as the original file and added a suffix of _1, _2, _3 and _4

Add outline to layer

This simple script adds a outline to the selected layer.

Seamless texture maker

Useful plugin for texture artists. In two clicks you can create seamless texture from image.

Features:
- automatically blending edges to remove "seam" effect
- split image into 4 layers - convenient for further editing
- overlapping if you want to postprocess image manually
- automatically make square texture (optional) - if you want to make power-of-two texture for game
- no repeating pattern effect

Of course, sometimes you need to use stamp tool or eraser tool to make texture looks better. But it is super-easy due to autosplitted layers.

High pass filter

Yet another high pass. I use it to normalize brightness of textures. This script provides two different approaches: grain extract mode (mainly used to remove the effect of vignettes) and soft light mode (for images with sharp lightness transitions, but this mode is not so powerful as grain extract).

After installing, you'll find it in:
Filters/Enhance/High Pass Filter

Result:

Startrails V2.0

This script calculates frames to create startrail videos.
***Update V2***
see below
**************

Startrails Video Gimp script

Create Gradient from Image application

I created a simple program in WINAPI to generate gradients of the downloaded jpg image files. The principle is simple, if an image is loaded, you can press the left mouse button in a fixed area image window, drag and release in the second section and the program automatically creates a preview of a gradient consisting of a number of segments displayed in the control at the top of the window. By pressing the button with the hand goes to manual mode, where you can add or subtract points on the path drawn by double clicking the left mouse button near a path.

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