batchgimp is a batch processor for rendering of
images. It uses a command-line interface, and
supports JPEG, GIF, PNG, and PSD file formats. It
accesses the GNU Image Manipulation Program (GIMP)
plug-in structure to provide image processing
functions. Images are processed in a batch for an
entire directory. batchgimp is written in Perl and
interfaces with the Scheme scripting engine
provided by the GIMP.