Patent ID: 6474768
Filing Date: 2002-11-05
Classification: H04N

Abstract:
A test pattern printing method of printing a test pattern used in correction processing, the correction processing making an output characteristic for each of a plurality of colorants a predetermined output characteristic to correct a color deviation, said method comprising the step of:printing a plurality of patches, each of which has a test area and a reference area adjacent to each other, the test area being printed with a mixture of the plurality of colorants and serving as an indicator for indicating a degree of the color deviation and the reference area being printed with a black colorant and a colorant other than the black colorant and serving as a reference to be compared with the test area, the plurality of patches being formed with dots of the plurality of colorants printed at different mixing ratios of the plurality of colorants, respectively, wherein the test area and the reference area are printed so that the spatial frequency of the dots in the test area and the spatial frequency of the dots in the reference area are close to each other.