Add the package with
ImageMagick will be used as needed if you've said
in your session or module. You should not generally say
ImageMagick. See FileIO for
It's worth pointing out that packages such as Images load FileIO.
ImageMagick.jl will use the system-wide libMagicWand in
present (e.g. via a manual installation with homebrew). If not it will install
its own copy via Homebrew.jl.
An alternative to ImageMagick on OS X is QuartzImageIO.
You may also find debugging Homebrew useful.
Manual installation on Windows
If automatic installation fails, get the current version from
(e.g. ImageMagick-6.8.8-7-Q16-x86-dll.exe) and make sure that the "Install
development headers and libraries for C and C++" checkbox is selected. You may
choose to let the installer add the installation directory to the system path or
provide it separately. In the later case you may add it to your
file as (for example)
"C:/programs/ImageMagick-6.8.8"). Alternatively, you can set your
MAGICK_HOME environment variable.
When manual intervention is necessary, you need to restart Julia for the necessary changes to take effect.
ImageMagick.jl automatically searches for an installed version of
libMagickWand. Use the environment variable
MAGICK_HOME to add to the search
ImageMagick.libversion to see what version it found. Version 6.7+
(up to but not including 7.0) are the most supported versions, in particular
for multipage TIFFs.
The environment variable
MAGICK_THREAD_LIMIT can be used to throttle multithreading.