A free software suite to create, edit, and compose bitmap images ImageMagick can read, write, and convert images in a large variety of formats. Images can be cropped, colors can be changed, various effects can be applied, images can be rotated and combined, and text, polygons, lines, ellipses and Bezier curves can be added to images and stretched and rotated.
ImageMagick is free software: it is delivered with full source code and can be freely used, copied, modified and distributed. Its license is compatible with the GPL. It runs on all major operating systems.
Most of the functionality of ImageMagick can be used interactively from the command line; more often, however, the features are used from programs written in the programming languages C, Ch, C++, Java, Perl, PHP, Python, Ruby, Tcl/Tk, for which ready-made ImageMagick interfaces (PerlMagick, Magick++, PythonMagick, MagickWand for PHP, RMagick, TclMagick, and JMagick) are available. This makes it possible to modify or create images automatically and dynamically.
ImageMagick supports many image formats (over 90) including formats like GIF, JPEG, JPEG-2000, PNG, PDF, PhotoCD, TIFF, and DPX.
Here are some key features of "ImageMagick":
Format conversion: convert an image from one format to another (e.g. PNG to JPEG)
Transform: resize, rotate, crop, flip or trim an image
Transparency: render portions of an image invisible
Draw: add shapes or text to an image
Decorate: add a border or frame to an image
Special effects: blur, sharpen, threshold, or tint an image
Animation: create a GIF animation sequence from a group of images
Text & comments: insert descriptive or artistic text in an image
Image identification: describe the format and properties of an image
Composite: overlap one image over another
Montage: juxtapose image thumbnails on an image canvas
Motion picture support: read and write the common image formats used in digital film work
Image calculator: apply a mathematical expression to an image or image channels
High dynamic-range images: accurately represent the wide range of intensity levels found in real scenes ranging from the brightest direct sunlight to the deepest darkest shadows
Large image support: read, process, or write mega- and giga-pixel image sizes
Threads of execution support: ImageMagick is thread safe and many internal algorithms are already threaded to take advantage of speed-ups offered by the dual and quad-core processor technologies
ImageMagick
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