The present invention relates to detecting digital watermarks. In a preferred embodiment, media is embedded with a digital watermark component. The media includes a cyan color plane, a magenta color plane, a yellow color plane, and a black color plane. The digital watermark component is embedded in the...http://www.google.com/patents/US20020067844?utm_source=gb-gplus-sharePatent US20020067844 - Detection of out-of-phase low visibility watermarks
