Predetermined additional information is superposed as a dot pattern on image information read by an image scanner, and the image information superposed with the additional information is modulated. The modulated information is demodulated and recorded on a recording medium to perform a series of operations,...http://www.google.com.tw/patents/US20020054356?utm_source=gb-gplus-share專利 US20020054356 - Image processing apparatus and method using image information and additional information or an additional pattern added thereto or superposed thereon
