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ImageMagick是一款非常好用的屏幕截图工具，在Ubuntu、Mint等主流Linux发行版本中会自带ImageMagick工具。新版本是ImageMagick 7.0.8-12，已经提供下载，能运行在Linux、Windows、Mac Os X、iOS、Android OS系统中，它支持多种格式，如PNG、JPEG、GIF、HEIC、TIFF、DPX、EXR、WebP、Postscript、PDF、SVG等。使用ImageMagick调整大小、翻转、镜像、旋转、扭曲、剪切和变换图像，调整图像颜色，应用各种特殊效果，或绘制文本、线、多边形、椭圆和贝塞尔曲线。如果你的Linux系统没有这款工具，你可以按照下面的方法进行安装。
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安装ImageMagick 1.如果是Ubuntu、Mint等系统可以在终端中运行以下命令安装： sudo apt-get install imagemagick 2.安装的文档（英文） ImageMagick RPM's are self-installing. Simply type the following command and you're ready to start using ImageMagick: $ rpm -Uvh ImageMagick-7.0.8-12.x86_64.rpm You'll need the libraries as well: $ rpm -Uvh ImageMagick-libs-7.0.8-12.x86_64.rpm For other systems, create (or choose) a directory to install the package into and change to that directory, for example: cd $HOME Next, extract the contents of the package. For example: tar xvzf ImageMagick.tar.gz Set the MAGICK_HOME environment variable to the path where you extracted the ImageMagick files. For example: $ export MAGICK_HOME="$HOME/ImageMagick-7.0.8" If the bin subdirectory of the extracted package is not already in your executable search path, add it to your PATH environment variable. For example: export PATH="$MAGICK_HOME/bin:$PATH On Linux and Solaris machines add $MAGICK_HOME/lib to the LD_LIBRARY_PATH environment variable: LD_LIBRARY_PATH="${LD_LIBRARY_PATH:+$LD_LIBRARY_PATH:}$MAGICK_HOME/lib export LD_LIBRARY_PATH Finally, to verify ImageMagick is working properly, type the following on the command line: magick logo: logo.gif identify logo.gif display logo.gif 3.提供有AppImage 可以参考下载运行AppImage：简单、可靠、快速的特性一文。
使用ImageMagick 1.安装ImageMagick完成后，执行以下命令就能在Linux系统中获取到屏幕截图（截取整个屏幕）： import -window root image.png 这里的“image.png”就是屏幕截图文件保存的名称，可以自由定义。 2.如果要获取屏幕的某一个区域截图，可以执行以下命令: import image.png “image.png”可以自定义为其他的名称。
附：ImageMagick特点与功能 Here are just a few examples of what ImageMagick can do: Format conversion: convert an image from one format to another (e.g. PNG to JPEG). Transform: resize, rotate, deskew, 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. Text & comments: insert descriptive or artistic text in an image. Image gradients: create a gradual blend of one color whose shape is horizontal, vertical, circular, or ellipical. 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. Delineate image features: Canny edge detection, mean-shift, Hough lines. 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. Connected component labeling: uniquely label connected regions in an image. Discrete Fourier transform: implements the forward and inverse DFT. Perceptual hash: maps visually identical images to the same or similar hash-- useful in image retrieval, authentication, indexing, or copy detection as well as digital watermarking. Complex text layout bidirectional text support and shaping. 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 are OpenMP-enabled 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 iPhone.
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