Patent ID: 8474942

Claim:
An image correction system that measures a patch printed on a printing medium with an inkjet printer, so as to perform density correction on image data to be printed, the inkjet printer being capable of printing with inks that include a plurality of chromatic colors, the system comprising: a colorimetric-value-acquiring unit configured to acquire colorimetric values by performing colorimetry on patches printed with the inkjet printer in those of the inks that have been associated for use with each of a plurality of kinds of printing media; a storage unit configured to obtain density correction information for each ink color based on the colorimetric values acquired by the colorimetric-value-acquiring unit and store the density correction information and a time when the density correction information has been acquired in a memory in association with the ink color; a receiving unit configured to receive information about user selection of a printing medium used for printing; a reading unit configured to read, from among the times stored in the memory, the most up-to-date times for the inks that are used for printing on the printing medium that corresponds to the information received by the receiving unit; a determining unit configured to determine whether or not the most up-to-date times for multiple chromatic color inks, out of the most up-to-date times read by the reading unit for the inks used for printing on the printing medium, are the same time; and a correction unit configured to, if the determining unit has determined that the most up-to-date times are the same time, perform density correction on the image data to be printed according to the density correction information acquired at the most up-to-date time; wherein if the determining unit has determined that the most up-to-date times are not the same time, the reading unit reads, from among the times stored in the memory, a time when the density correction information on all the multiple chromatic color inks has been acquired at the same time, and the correction unit performs density correction on the image data to be printed according to the density correction information acquired at the time when the density correction information on all the multiple chromatic color inks has been acquired at the same time.