A method for extracting text from images whereby the intensity of each color plane of the image is identified, the color plane with the highest intensity is converted into a black and white image, and character recognition is performed on the black and white image to determine the text of the image....http://www.google.fr/patents/US6704449?utm_source=gb-gplus-shareBrevet US6704449 - Method of extracting text from graphical images
