| 摘要 |
An image forming apparatus includes: an image forming section; a first density sensor; a second density sensor; and a control section to control the image forming section to form a first gradation pattern image including patches having different densities on the image carrier, to execute gradation correction of the image forming section based on a detection result obtained with the first density sensor, to control the image forming section to print a second gradation pattern image including patches having different densities on the sheet, and to execute the gradation correction based on a detection result obtained with the second density sensor, and wherein the control section adds a gradation correction result by the first density sensor to a gradation correction result by the second density sensor according to a predetermined ratio, and executes the gradation correction based on an addition result.
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