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mtPaint is a simple GTK+1/2 painting program designed for creating icons and pixel based artwork. It can edit indexed palette or 24 bit RGB images and offers basic painting and palette manipulation tools. It also has several other more powerful features such as channels, layers and animation. Due to its simplicity and lack of dependencies it runs well on GNU/Linux, Windows and older PC hardware.

Netpbm is a toolkit for conversion of images between a variety of different formats, as well as to allow a few basic image operations. Netpbm is based on the widely spread Pbmplus package (release: 10 Dec 91). On top of that, a lot of improvements and additions have been made. After the latest release of Pbmplus, a lot of additional filters have been circulating on the net. The aim of Netpbm was, to collect these and to turn them into a package. This work has been performed by a group of programmers all over the world.

A very configureable web-gallery generator written in perl with support for templates.

Non-Uniform Rational B-Splines (NURBS) are parametric functions which can represent any type of curves or surfaces. This C++ library hides the basic mathematics of NURBS, allowing the user to focus on the more challenging parts of their projects. The NURBS++ package includes a matrix library, an image manipulation library, a numerical library and a NURBS library. This library is copyrighted under the terms of the LGPL by its author, Phillipe Lavoie <lavoie@zeus.genie.uottawa.ca>.

The NVIDIA Texture Tools is a collection of image processing and texture manipulation tools, designed to be integrated in game tools and asset conditioning pipelines. The primary features of the library are mipmap and normal map generation, format conversion and DXT compression. DXT compression is based on Simon Brown's squish library. The library also contains an alternative GPU-accelerated compressor that uses CUDA and is one order of magnitude faster.

This is an image processing library, which provides some basic functions of image processing and loading/saving various image file formats. In addition the library can handle huge images that cannot be (or can hardly be) stored into the memory (the library automatically creates swap files and escapes them to reduce the memory usage).

LablGL is an OpenGL interface for Objective Caml. Since it includes support for the Togl widget, you can comfortably use it with LablTk. All of the GL and GLU libraries are available. Read a good book about how to use these. Translating from OpenGL to LablGL is rather straightforward: there is a LablGL function for each OpenGL one. For ease of retrieving, both GL and GLU are cut in smaller modules of related functions. Please see ${PREFIX}/share/doc/ocaml/lablgl/README for further information.

GNU Ocrad is an OCR (Optical Character Recognition) program implemented as a filter and based on a feature extraction method. It reads a bitmap image in pbm format and outputs text in ISO-8859-1 (Latin-1) charset. Also includes a layout analyser able to separate the columns or blocks of text normally found on printed pages. It can be used as a stand-alone console application, or as a backend to other programs.

OCRE is an optical character recognition (OCR) system that reads an image file and writes ASCII or Unicode characters.