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GPLv2

Formulas

This simple plugin allows you to change the values of each color channel of each pixel of a layer by using mathematical expressions.
It is able to handle RGB* and Gray* images. Available operators are: +, -, *, /, , and %.
There are many functions available, such as sin, cos, sqrt, abs, min, max.
A few constants are provided (pi, e, j), and a lot of pre-defined variables are usable (w for image's width, h for image's height, x and y for cartesian coordinates in the image, etc.).

Save for Web

Save for Web allows to find compromise between minimal file size and acceptable quality of image quickly. While adjusting various settings, you may explore how image quality and file size change. Options to reduce file size of an image include setting compression quality, number or colors, resizing, cropping, Exif information removal, etc.

If you want to send translations/contribute, please visit http://github.com/auris/gimp-save-for-web

uc-AVI 0.6a

The plug-in loads common uncompressed AVI files into multilayer images. It saves multilayer images to uncompressed AVI. Audio is discarded, only one video stream is supported. Compressed AVIs may be loaded using mencoder to import.

streak 0.6

This Gimp plug-in is a simulation of a streak camera. A streak camera images an object through a slit - thus getting a kind of "one dimensional image". This image is propagated along the second dimension of the image plane at a constant speed. The result is a picture of the time dependency of the object. The plug-in takes a film (multilayer image), cuts a slice of selectable width and position out of each layer and puts the slices together to the streak image.
"/Filters/Animation/Streak"

split 0.4

This Gimp plug-in splits an image into layers. The plug-in cuts an image into a number of rows and columns and composes a new multilayer image (film) of these pieces. It's just the reverse of the poster plug-in.

poster 0.6

This Gimp plug-in combines image layers by attaching them in rows and columns. This is useful especially for films.
"/Filters/Animation/Poster"

layer extract 0.4

This Gimp plug-in creates a new image/film by periodically extracting layers from another image. It takes one interval (number of sequent layers) every period. The number of periods can be limited.
"/Filters/Animation/Layer Extract"

interlace tool 0.2a

This Gimp plug-in interlaces/deinterlaces all layers of a film (multilayer image).

interlace: The number of layers is divided by 2 merging two successive layers into even/odd numbered lines of one layer. You can keep the image height by dropping lines or double it and keep all the lines.
deinterlace: Even and odd numbered lines of each layer are stored into two separate layers. Thus the number of layers is doubled. Lines in between are interpolated or skipped (selectable), i.e. the new image has the original height or half of it.

edit image comment 0.2

This Gimp plug-in edits the image comment.
"/Image/Edit Comment".

gimp-ace2

A port of gimp-ace to GIMP 2.2, based on gimp-ace 0.6.3.

Reading from the original description there: The basic "Stretch Contrast" operation takes in the whole image at once, and if there is a white pixel anywhere in the image and a black pixel anywhere in the image, it figures the contrast is already as good as can be. But Adaptive Contrast Enhancement works to increase the contrast locally, and brings out details that most wide-sweeping contrast-enhancements pass over.

Runs also on GIMP 2.4, but the GUI is not 100% adopted.

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