Patent ID: 8908229
Filing Date: 2014-12-09
Classification: H04N

Abstract:
1. An image processing apparatus comprising: an obtaining unit configured to obtain a gamma correction table to be used at the time of image formation on non-reference paper by using a correlation between a characteristic of reference paper and a characteristic of the non-reference paper and a gamma correction table obtained by executing calibration using the reference paper; a first reading unit configured to form a first pattern on plain paper and to read the formed first pattern on the plain paper; a second reading unit configured to form a second pattern on an image bearing member and to read the formed second pattern on the image bearing member; a comparison unit configured to compare a value read by the first reading unit with a value read by the second reading unit; and a correction unit configured to correct the correlation between a characteristic of the reference paper and a characteristic of the non-reference paper to be used at the time of obtaining the gamma correction table for the non-reference paper by the obtaining unit when a difference of the values compared by the comparison unit exceeds a first threshold.