ImageMagick is an all-in-one freeware graphics software suite for creating, editing, composing, or converting images in Windows, Linux, and Mac.

It can read and write images in various formats (over 100), including DPX, EXR, GIF, JPEG, JPEG-2000, PDF, PhotoCD, PNG, Postscript, SVG, and TIFF. Use ImageMagick to resize, flip, mirror, rotate, distort, shear and transform images, adjust image colors, apply various special effects, or draw text, lines, polygons, ellipses, and Bézier curves.

You have the option to use ImageMagick directly from the command line, or you can use the features from programs written in your favorite language.

ImageMagick Features:

● 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 attributes of an image.
● Composite: overlap one image over another.
● Montage: juxtapose image thumbnails on an image canvas.
● Generalized pixel distortion: correct for or induce image distortions, including perspective.
● Morphology of shapes: extract features, describe shapes, and recognize patterns in images.
● 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.
● Discrete Fourier transform: implements the forward and inverse DFT.
● Color management: accurate color management with color profiles or instead of-- built-in gamma compression or expansion as demanded by the color space.
● 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.
● Encipher or decipher an image: convert ordinary images into unintelligible gibberish and back again.
● Virtual pixel support: convenient access to pixels outside the image region.
● Large image support: read, process, or write mega-, giga-, or tera-pixel image sizes.
● Threads of execution support: ImageMagick is thread-safe, and most internal algorithms execute in parallel to take advantage of speed-ups offered by multicore processor chips.
● Distributed pixel cache: offload intermediate pixel storage to one or more remote servers.
● Heterogeneous distributed processing: certain algorithms are OpenCL-enabled to take advantage of speed-ups offered by executing in concert across heterogeneous platforms consisting of CPUs, GPUs, and other processors.
● ImageMagick on the iPhone: Convert, edit, or compose images on your iOS computing device such as the iPhone or iPad.

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