| 摘要 |
PROBLEM TO BE SOLVED: To provide an image data processor which is capable of realizing an exposure adjusting processing which is capable of surely sticking the toner of black components on paper. SOLUTION: When an exposure degree which is higher than the standard degree is inputted, a processing in which the rate of change of an output is relatively large for the change of an input is performed for BK input image data (a straight line B2 ). Conversely, a processing in which the rate of change of the output is relatively small for the change of the output is performed for CMY input image data (a straight line B1 ). Therefore, BK input image data is converted into the BK output image data which is larger than the CMY output image data for the CMY input image of the same value. Therefore, the use amount of CMY toner can be suppressed and the use amount of BK toner can be increased at that rate. As a result, black toner can be surely stuck to paper. Therefore, the color blurring of a thin line part can be prevented. The black color can be excellently reproduced. |
