| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming apparatus which performs image quality control with high accuracy without reducing productivity to stably form an image with high image quality to a problem that accuracy of control is reduced when environment and characteristics of the image forming apparatus sharply change in conventional image quality control. SOLUTION: Reference patterns at a plurality of levels are formed on an image carrier, basic image forming conditions to be applied to attain levels of density of output images at all points on a gradation curve are corrected on the basis of detected density of the reference patterns formed by the image forming conditions at the plurality of levels. COPYRIGHT: (C)2010,JPO&INPIT
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