The display profiling method with eyes and colormatching accuracy in soft proofing

ABSTRACT We developed the method to adjust a display to a predetermined state and to make ICC display profiles with humaneyes. In our method, in order to measure the tone reproduction curve of a display device, the brightness and hue of acontinuous tone image is adjusted to the brightness and hue of a binary image. In addition, three pairs of images havingdifferent values of brightness are used. These methods enable one to measure the complex tone reproduction curve.Furthermore, the color of the display white is adjusted to the color of a white object under the viewing illuminant. Ourmethod can adjust the display white for any viewing illuminant. To bear out the color matching accuracy of ourmethod, two kinds of experiments were carried out for three LCDs, and three subjects. First, we measured the chromaof gray. The result was that the chroma of the display adjusted by our method was smaller than the chroma of the un-adjusted display. Second, we simulated the color of DDCP on the display and measured the matching accuracydisplaying the ISO 12642 color chart. Though the average E was 13.25 to 14.68 with the un-adjusted display, 2.87 to6.85 for the adjusted display by our method. Thus, our method could reduce the color difference between both devices.These results show the display adjusted by our method has enough accuracy to use for soft proofing. Keywords: Soft Proofing, Color Management, Display Profile, LCD