| 摘要 |
An image forming apparatus which forms an electrostatic latent image on a photosensitive drum, serving as an image carrier, develops the image using toners of a plurality of colors, and transfers a toner image onto a printing medium in accordance with an electrophotographic process. A toner consumption amount detection unit detects the toner consumption amount of each of the toners of the plurality of colors, a decision unit decides upon a color to form a patch, based on input image data and the detected toner consumption amount of each color, a patch sensor detects the density of a patch of the decided color by generating the patch at a predetermined position on the photosensitive drum serving as an image carrier outside an area to form a color image, and an adjustment unit adjusts the printing density based on the detected patch density.
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