| 摘要 |
An image forming apparatus includes: a recording unit configured to record plural calibration data, an image forming unit configured to read out the plural calibration data and forming plural calibration patterns as images on a recording medium according to the plural calibration data read out, an ADF reading unit configured to automatically convey and read the recording medium having the plural calibration patterns formed thereon and output image data, an error judging unit configured to compare the image data with reference data prepared in advance to judge whether there is an error in reading of the plural calibration patterns, a calculating unit configured to receive plural image data corresponding to the plural calibration patterns read and compare the plural image data with plural reference image data prepared in advance, respectively, to calculate plural image correction amounts, an image processing unit configured to apply, according to the plural image correction amounts, image correction to image data of an original read anew, and a control unit configured to control the respective units in order to output, when the error judging unit judges that there is an error in the reading of the plural calibration patterns, an instruction signal in order to place the recording medium having the plural calibration patterns formed thereon on the ADF reading unit again and perform reading again when the recording medium is placed on the ADF reading unit again.
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