| 摘要 |
An image forming apparatus and method in which, when a recording medium on which a gray-scale pattern has been formed is placed upon a platen in a skewed attitude, the resulting offset is corrected and image forming conditions are adjusted to obtain an ideal image. In one one such apparatus, a 256-tone pattern image of a designated color is formed on a recording medium. If the recording medium has been placed upon a platen in a skewed attitude when the pattern is to be read, the position of the pattern image is corrected, the gamma characteristics of a LUT are calculated based upon the correct pattern image and the calculated values for the LUT are set.
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