| 摘要 |
At power-on, an image forming apparatus is in a state after it is left standing for some time in many cases, so that an image characteristic is largely different from that when gammaLUT correction table is prepared by an immediately before correction and is close to that at the time of previous power-on. For this reason, image formation is judged whether it is first image formation after power-on or not (S 21 ), and in the case of the first image formation, the gammaLUT correction table is replaced with an original gammaLUT correction table at the time of previous power-on (S 22 ). In the case where the image formation is not the first image formation, the immediately before gammaLUT correction table obtained after power-on is used as it is. As a result, it becomes possible to stabilize a density or coloring of a first image after power-on while reducing a warm-up time immediately after power-on.
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