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http://www.gimp.org/docs/python/index.html

Python Documentation

This document outlines the interfaces to GIMP-Python, which is a set of Python modules that act as a wrapper to libgimp allowing the writing of plug-ins for GIMP. In this way, GIMP-Python is similar to Script-Fu, except that you can use the full set of Python extension modules from the plug-in. Introduction What is it? GIMP-Python is a scripting extension for GIMP, similar to Script-Fu. The main difference is in what is called first.
GIMP is the undisputed king of image editing in Linux platforms, and is next only to Photoshop in popularity in Windows and Mac platforms. With a large community of developers and an even larger pool of users, it is no surprise that GIMP is very popular. Much like Firefox, GIMP’s strength lies in its plugins, which are developed by the open-source toting community. Since the users themselves develop them, they know all the needs and conceive a plugin for everything. And what better way for me to endorse GIMP than a list of good plugins? Most of them are aimed at web-designers and photographers, the main users of GIMP. http://www.techzilo.com/gimp-plugins/

Top 40+ GIMP plugins

Simulating Shallow Depth of Field with The GIMP

http://gimpguru.org/tutorials/simulateddof/ SimulatedDOF One of the facts of life of shooting with consumer digicams and their associated small imaging sensors is that it can be difficult to achieve a shallow depth of field. Having large depth of field is usually a good thing, leading to pictures in which all of the important parts of the picture are in focus. But sometimes you really want shallow depth of field to isolate a subject against a blurred background, as is often done in e.g. portraiture. In this tutorial I’ll show you how to simulate a shallow depth of field using image editing techniques.