| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for forming ink-jet images which can restrict image degradation to a minimum. SOLUTION: When black dots are formed in a predetermined region by an area ratio of 50% and dots of any of Y, M and C are superposed thereon, with respect to a color difference change in the case where the Y, M and C dots are respectively slightly shifted from the black dots, the Y ink shows a small color difference value as compared with the other M and C inks if a pixel shift area ratio is equal. Therefore, the image degradation can be restricted to a minimum even if the positional shift from the black dots is brought about by using the Y ink to all color dots to be superposed on the black dots or at least to a position where a color shift is particularly conspicuous. The color shift is prevented from being conspicuous by superposing dots of the same color as a color of an adjacent color region for an out line part of a black pixel region adjacent to the color region. |
