Attention
WARNING: From 9am on 19th August until 5pm on 2nd September there will be no access to the Stanage HPC cluster.
We will send an email to notify you when Stanage is back online and available for job submission.
Attention
The ShARC HPC cluster was decommissioned on the 30th of November 2023 at 17:00. It is no longer possible for users to access that cluster.
ImageMagick
ImageMagick is a collection of tools for creating, editing, viewing, composing and converting images. Many bitmap and vector-based file formats are supported.
ImageMagick is installed on the cluster’s worker nodes. It provides a number of command-line programs plus an API for programmatic control.
Command-line usage
Some of the some of the most useful included command-line programs are:
display
Display an image stored in a file:
display winterview.jpg
display -resize 800x600 winterview.jpg
Display a series of files as a slide show:
display -delay 2 *.jpg
convert
Convert an image from one format to another e.g.
convert -format tiff pic1.jpg pic1.tiff
To capture from screen to a file:
convert -format jpeg X: newpicture.jpg
animate
Create an animation effect from a set of files containing snap-shots:
animate pic1.tiff pic2.tiff pic3.tiff pic4.tiff pic5.tiff
Create an animated-gif from a series of gif files (mypics*.gif):
convert -delay 40 -loop 0 mypics*.gif myanimated.gif
Note that non-gif files should first be converted:
convert -format gif mypic1.jpg mypic1.gif
identify
View image metadata:
identify parkwood.jpg
More detailed information:
identify -verbose parkwood.jpg
More information on on these and other provided command-line tools (compare, composite, conjure, import, mogrify, montage and stream) can be found in the official ImageMagick 6 documentation.
Programmatic access (API)
There are ImageMagick APIs for most common programming languages, allowing you to script/automate your image manipulation using C++, Ruby, Perl, Python etc.
A list of ImageMagick APIs can be found on the ImageMagick 6 site. This list may not be comprehensive.
Installation notes
Version 6.7.8.9-15
This was installed on the worker nodes using the operating system’s package manager (i.e. the RPM for Centos 7.x is installed).