Patent ID: 9516196
Filing Date: 2016-12-06
CPC Classification: H04N

Claim Text:
1. An image forming apparatus comprising: a correction unit configured to correct image data using a correction condition; an image forming unit configured to form (i) an image, having a density, and (ii) a measurement image on a recording medium, based on the image data corrected by the correction unit; an obtaining unit configured to obtain read data obtained by a reading unit configured to read the measurement image formed on the recording medium by the image forming unit; a determination unit configured to determine a contrast potential used in a case when the image forming unit forms the image based on the image data, based on the read data obtained by the obtaining unit; a conversion unit configured to convert the read data to density data, using a conversion condition corresponding to the recording medium; a first generation unit configured to generate the correction condition, based on the density data obtained by the conversion unit converting the read data; a storage unit configured to store a first conversion condition corresponding to a specific recording medium; a second generation unit configured (i) to control the image forming unit to form a first image pattern on the specific recording medium and to form a second image pattern on another recording medium, different from the specific recording medium, and (ii) to generate a second conversion condition corresponding to the other recording medium using first read data, second read data, and the first conversion condition stored in the storage unit, the first read data being obtained by the reading unit reading the first image pattern on the specific recording medium, and the second read data being obtained by the reading unit reading the second image pattern on the other recording medium, wherein the first image pattern and the second image pattern each have a density; and a control unit configured to control the contrast potential used in a case when the image forming unit forms the first image pattern and the second image pattern, so that (i) the maximum density of the first image pattern and the second image pattern formed by the image forming unit is higher than (ii) the maximum density of the image formed by the image forming unit, wherein (i) the first conversion condition is used for converting read data of the measurement image on the specific recording medium into density data on the specific recording medium, and (ii) the second conversion condition is used for converting read data of the measurement image on the other recording medium into density data on the specific recording medium.