The software mainly consists of a number of
command-line interface utilities for manipulating images. ImageMagick does not have a robust
graphical user interface to edit images as do
Adobe Photoshop and
GIMP, but does include – for
Unix-like operating systems – a basic native
X Window GUI (called IMDisplay) for rendering and manipulating images and
API libraries for many programming languages. The program uses
magic numbers to identify image
file formats. A number of programs, such as
Drupal,
MediaWiki,
phpBB, and
vBulletin, can use ImageMagick to create image
thumbnails if installed. ImageMagick is also used by other programs, such as
LyX, for converting images. ImageMagick has a fully integrated
Perl binding called PerlMagick, as well as many others: G2F (
Ada), MagickCore (
C), MagickWand (C), ChMagick (Ch), ImageMagickObject (
COM+), Magick++ (
C++), JMagick (
Java), L-Magick (
Lisp), NMagick (
Neko/
Haxe), MagickNet (
.NET), PascalMagick (
Pascal), MagickWand for PHP (
PHP), IMagick (PHP), PythonMagick (
Python), RMagick (
Ruby), and TclMagick (
Tcl/Tk).
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 (it uses the command magick to achieve this).
Color quantization The number of colors in an image can be reduced to an arbitrary number by weighing the most prominent color values present among the pixels of the image. A related capability is the
posterization artistic effect, which also reduces the number of colors represented in an image. The difference between this and standard color quantization is that while in standard quantization the final palette is selected based upon a weighting of the prominence of existing colors in the image, posterization creates a palette of colors smoothly distributed across the spectrum represented in the image. Whereas with standard color quantization all of the final color values are ones that were in the original image, the color values in a posterized image may not have been present in the original image but are in between the original color values.
Dithering A fine control is provided for the
dithering that occurs during color and shading alterations, including the ability to generate
halftone dithering.
Liquid rescaling In 2008, support for
liquid rescaling was added. This feature allows, for example,
rescaling 4:3 images into 16:9 images without distorting the image.
Artistic effects ImageMagick includes a variety of filters and features intended to create artistic effects: • Charcoal sketch transform •
Posterization OpenCL ImageMagick can use
OpenCL to use an accelerated graphics card (
GPU) for processing.
Deep color The Q8 version supports up-to 8 bits-per-pixel component (8-bit
grayscale, 24- or 32-bit
RGB color). The Q16 version supports up-to 16 bits-per-pixel component (16-bit grayscale, up-to 48- or 64-bit RGB color).
Other Below are some other 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. (Applies these without
generation loss on JPEG files, where possible.) • 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: assemble a
GIF animation file from a sequence of images. • Text and 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 forward and inverse DFT. • Color management: accurate color management with color profiles or in lieu of – built-in
gamma compression or expansion as demanded by the colorspace. • 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
multi-core processor chips. • 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. • Distributed pixel cache: offload intermediate pixel storage to one or more remote servers. ==Distribution==