| 摘要 |
PROBLEM TO BE SOLVED: To prevent the output of an image in an erroneous gradation by correcting so as to reduce a density differential between the detecting density of the sample toner image and the setting density of the sample toner image, and setting so as to change the density differential adjusting amount corresponding to a specific density differential depending to the density area. SOLUTION: As for this image forming device, sample image data area means Me store the sample toner image setting density the sample toner image provided with the different density setting density on a specified area. The toner density sensor SNd detects the density of the sample toner image formed on the image carrier. Density conversion table producing means 122 correct the density conversion data by a correction amount corresponding to the density differential so that the density differential between the detection density of the sample toner image detected by the toner density sensor SNd and the sample toner image setting density becomes small. Moreover, the density conversion table producing means 122 correct the density conversion data to the smaller, in the case of the same density differential, in the low density and high density areas, and to the larger in the intermediate density area. |
