====== Images in Greenstone ======



===== Watermarking =====

There are several ways to do watermarking. 

If you want the watermark to be a real security protection (so that if someone was to download the
image locally, the watermark would still appear on the image), you have to develop some server-side script that merge the original image with the watermark and shows a "modified" image. This can 
be done with software like [[http://www.imagemagick.org/Usage/annotating/#watermarking|Imagemagick]]
or [[http://www.makeuseof.com/tag/watermark-images-photoshop/|Photoshop]]. 

You can also add "soft" watermarks. It is not a real security protection, because users can save
 the the image locally and you will see it without the watermark. But if you only need the "warning" it is enough. You can do this with [[http://stackoverflow.com/questions/1625706/add-watermark-with-css|css]] or [[http://www.patrick-wied.at/static/watermarkjs/|javascript]].