Patent ID: 7305125

Claim:
A color-correcting device, used in an image forming apparatus, for matching colors in a first image displayed on the image forming apparatus with colors in a second image displayed on a display apparatus, the image forming apparatus capturing the first image consisting of an array of pixels which each has first color values conforming to a first color space with N first color components, the image forming apparatus also converting the first color values of each pixel of the first image into second color values conforming to a second color space with N second color components respectively, the image forming apparatus also outputting the second color values, conforming to the second color space, of the first image to the display apparatus which displays the second image based on the second color values of the first image, N being a natural number, said device comprising: a storing module for storing at least N third images which each has third color values consisting of only one of the N first color components of the first color space; a converting module for converting the third color values, conforming to the first color space, of each of the third images into fourth color values conforming to the second color space respectively; an outputting module for outputting the fourth color values of the third images from the image forming apparatus to the display apparatus respectively, wherein the display apparatus respectively displays, based on the fourth color values of the third images, at least N fourth images which each corresponds to one of the third images; a capturing module for capturing the fourth images respectively displayed on the display apparatus to obtain at least N fifth images, each of the fifth images corresponding to one of the fourth images; a measuring module for measuring fifth color values, conforming to the first color space, of each of the fifth images respectively; a calculating module for calculating a set of correction coefficients in accordance with the third color values, conforming to the first color space, of the third images and the fifth color values, conforming to the first color space, of the fifth images; and a correcting module for correcting the second color values of the first image in accordance with the set of correction coefficients to obtain corrected second color values, conforming to the second color space, of the first image; wherein after the corrected second color values, conforming to the second color space, of the first image are obtained, the image forming apparatus outputs the corrected second color values of the first image to the display apparatus, and then the display apparatus newly displays the second image based on the corrected second color values of the first image on the display apparatus such that the colors in the first image displayed on the image forming apparatus substantially match with the colors in the second image displayed on the display apparatus.