GIMP Plugin Registry

Imprints a non-intrusive faint text watermark sparsely repeated over the entire image. The watermark is meant to be visible upon close inspection without disturbing the viewing of the image.

The watermark visibility can be fine-tuned by changing the opacity of the watermark layer.

Contains an image plugin that operates on an open image and a batch
plugin that requires the filenames for the source and modified images.

Requires Python.

Install in the plug-ins GIMP directory. Make sure the file is executable or GIMP will ignore it.

To process a file via command-line:

gimp -ib '(python-fu-batch-watermark RUN-NONINTERACTIVE "image.jpg" "image-wm.jpg" 12 "(C)2009" "Sans Bold" 24)(gimp-quit 1)'

The parameters are source image, "save as" filename, opacity, text, font name, font size in points.