Abstract
The values of color difference ΔE*ab in the uniform color space CIELAB (CIE1976) are known not to correspond to the visual color difference in some cases. CIE recommends the CIEDE2000 formula for color difference evaluation because of the good agreement between the calculation results and the visual differences. This formula was developed based on the evaluations using samples with color differences on the background of Munsell N5 gray. However, in the case of evaluations of printed documents on white paper, we can not use this formula as it is, since the evaluation conditions differ from each other. In this paper, we report that we conducted the evaluations of acceptable color difference using printed documents on the background of plain white paper and developed a color-difference formula for printed documents. We also report the comparison results of performance between CIEDE2000 and our developed formula.
