ImageMagick

ImageMagick is an open source software suite for displaying, converting, and editing raster image files. It can read and write over 100 image file formats. ImageMagick is licensed under the Apache 2.0 license.

Features

The software mainly consists of a number of command-line interface utilities for manipulating images. ImageMagick does not have a GUI-based interface to edit images, as do Adobe Photoshop and GIMP, but instead modifies existing images as directed by various command-line parameters. Nevertheless, ImageMagick also includes an X Window graphical user interface for rendering and manipulating images called IMDisplay and API libraries for many programming languages. The program uses magic numbers to identify image file formats.

A number of programs, such as MediaWiki, phpBB, and vBulletin, can use ImageMagick to create image thumbnails if it is installed. ImageMagick is also used by other programs, such as LyX, for converting images.

ImageMagick has a fully integrated Perl API called PerlMagick, as well as many other APIs.

File format conversion

One of the basic and thoroughly-implemented features of ImageMagick is its ability to efficiently and accurately convert images between different file formats.

Color quantization

The number of colors in an image can be reduced to an arbitrary number and this is done by intelligently weighing the most prominent color values present among the pixels of the image. Note that...
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