[Dspace-tech] Watermarking images on the fly

Dear All, I have stumbled on this old thread [1]. I am aware of the Branded Preview JPEG available as media-filter. I would like to ask if anybody from the list have implemented watermarking images on the fly? The same way as using the citation cover page where a derivative file was created upon

Re: [Dspace-tech] Watermarking images on-the-fly

Hi Shane, Have there been any projects investigating the potential for watermarking images stored in the repository as they are accessed by the user? Here is a quick guide to using PHP and the GD Graphics Library to accomplish this, but not within the DSpace environment:

Re: [Dspace-tech] Watermarking images on-the-fly

What are you trying to achieve? * Are you looking for visible or invisible watermarks (steganography, ala Digimarc et.al.)? * Are you looking to have on-the-fly information embedded? On a per-user basis? * If yes, how do you plan to keep track of that information? And if yes to the latter,