4 command-line graphics tools for Linux: 
Images and the command line. They seem an unlikely pair, don’t they? There are people who’ll tell you that the only way you can manipulate and view graphics is with GUI applications like GIMP.
For the most part, they’re wrong. Command-line image tools do much of what their GUI counterparts can, and they can do it just as well. Sometimes, especially when dealing with multiple image files or working on an older computer, command-line tools can do a better job.
read more: Opensource.com ScottNesbitt
Supporting Open Source.
Have you tried: Farking?