A method and apparatus to detect marks of a specified shape and color on a document and to extract a specified pattern consisting of a number of these marks. An RGB color signal is sent, color by color, by way of image input unit 12 to binary processing unit 13. If the marks are yellow, the B signal...http://www.google.fr/patents/US6115494?utm_source=gb-gplus-shareBrevet US6115494 - Image processing method and device and scanner and printer equipped with same
Image processing method and device and scanner and printer equipped with same
