ion unit selects if input image data from a color image input unit is to be processed as a monochrome...http://www.google.com/patents/US6226397?utm_source=gb-gplus-sharePatent US6226397 - Image processing using different image sizes depending on whether the processing is color or monochromeAdvanced Patent SearchPublication numberUS6226397 B1Publication typeGrantApplication numberUS 08/895,992Publi