Methods and apparatus are provided, first for converting a colour image to a set of monochrome or, preferably, grayscale image components and then for producing a reconstructed colour image from such set of monochrome or grayscale image components assumed to derive from an original colour image. Preferably,...http://www.google.com.tw/patents/US20030188659?utm_source=gb-gplus-share專利 US20030188659 - Method and apparatus for reproducing a color image based on monochrome images derived therefrom
