Message-Id: <mailto:199504070353.WAA21819@library.wustl.edu> Date: Thu, 6 Apr 1995 16:35:56 -0500 From: Sandeep Somaiya <mailto:sandeep@NEXT2.VTLS.COM> Subject: Re: Watermarking digital images To: Multiple recipients of list IMAGELIB
Tracy Denton <mailto:tdenton@fiat.gslis.utexas.edu> wrote: >>presentation about security issues in digital imaging ....
>>If anyone can tell me where I can find more information on
>>watermarking or any other means of protecting digital images,
In order to "protect digital images" or what some to refer to as "Rights Management" or "Marketplace Management". There are a lot of different ways in which rights management and security is being handled: a. Authentication - maybe by domain name, passwords, mulitple levels of security and passwords b. Logs and Status file - log files can be maintained which keep track of user access, number of accesses, if printed, calculation of royalties [some refer to it as Royalty Management] c. Encryption - use of encryption keys d. File permissions/access/printing protection e. Firewalls and other system administration based methods f. In systems where the bibliographic OPAC is used as the index for retreiving the digital data - copyright and rights info in the notes field or similar field g. Electronic Watermarking etc.
Many vendors and institutions are using a variety of schemes. For example, in the VTLS-InfoStation, we let the librarian add a hypermedia copyright annotation icon that can be placed any where on the image and when a user clicks on it the copyright information might come up for that image; and/or having password authentication; and/or restricting file permissions depending on user machine domain name or account group; we are at present working on keeping log files on access for royalties management.
You specifically mentioned that you were looking at more information on Electronic Watermarking. In my view IBM's implementation is very clean. IBM is using it for the Vatican Library project where they are digitizing close to 20,000 rare documents.. The watermark they have on these images is unobstructive_yet_visible. Watermarking is used in this project to ensure protection of the distributed images.
If you want to see some sample images with Watermarks on it please use the following HTTP URL:"http://www.ibm.com/Features/library/manuscrpt.html" to see the IBM Scriptorium, this page has about 7 JPEG images and some [if not all] the images have an Electronic Watermark on them.
Hope this information is helpful.
Sandeep Somaiya VTLS Multimedia Services, VTLS Inc. "Look, Learn, Listen ... Libraries change Lives" <Standard disclaimer applies> + < my opinions are my own and donot reflect those of my employer>