In order to reduce data storage and transmission bandwidth requirements, a high resolution gray scale image is represented in two separate image forms, namely, a high resolution, high sampling density black and white image and a lower resolution, lower sampling density gray scale image. Generating separate...http://www.google.es/patents/US4924521?utm_source=gb-gplus-sharePatente US4924521 - Image processing system and method employing combined black and white and gray scale image data
Image processing system and method employing combined black and white and ...
