Ripped from the ImageMagick website: "ImageMagick is a collection of tools and libraries to read, write, and manipulate an image in many image formats. With ImageMagick you can create images dynamically, making it suitable for Web applications. You can also resize, rotate, sharpen, color reduce, or add special effects to an image or image sequence and save your completed work in the same or differing image format. Image processing operations are available from the command line, as well as through C, C++, Perl, or Java programming interfaces."

Most scripts should find and use ImageMagick automatically should they need it as the libraries are installed in the default location of /usr/local/lib/

Should your script need to call the 'convert' program it can be found at /usr/local/bin/convert