Watermark-detection in the graphics card of a personal computer, for the purpose of copy-protection, has recently started to draw a lot of attention in standardization. Detection in the graphics card has problems completely different from the formerly considered detection in the DVD-drive, having to...http://www.google.com/patents/US20060126887?utm_source=gb-gplus-sharePatent US20060126887 - Method and arrangement for watermark detection
