| 摘要 |
<P>PROBLEM TO BE SOLVED: To always excellently control image density by considering the surface reflectance of an image carrier in an image forming apparatus. <P>SOLUTION: A toner image patch for measuring density is formed on an intermediate transfer drum being the image carrier after obtaining a surface density measured value by measuring the front surface density of the intermediate transfer drum. By referring to a reference table to regulate relation between the surface density measured value measured by setting the output density of the toner image patch as patch output density and the ideal output density of the toner image patch, the ideal output density corresponding to the surface density measured value is obtained so as to find deviation between the patch output density and the ideal output density and generate a γ correction table showing a gradation correction value according to the deviation. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
