Patent ID: 7433064
Filing Date: 2008-10-07
Classification: B41J,H04N

Abstract:
1. A printing apparatus comprising: a unit that generates test pattern data considering visual characteristics, on the basis of a test pattern grayscale value determined on the basis of visual sensitivity; an N-value conversion unit that converts the test pattern data generated by the unit that generates test pattern data considering visual characteristics into an N value (N≧2: N is a natural number); a printing data generating unit that generates test pattern printing data on the basis of the N-value test pattern data output from the N-value conversion unit; a printing unit that performs printing on the basis of the test pattern printing data generated by the printing data generating unit; an output density detecting unit that detects the output density of a test pattern printed by the printing unit; a printer input/output density information generating unit that generates printer input/output density information for correcting input density, on the basis of the output density of the test pattern detected by the output density detecting unit; an image data acquiring unit that acquires image data composed of M values (M>N≧2: M is a natural number); an input density correcting unit that corrects the input density of the image data acquired by the image data acquiring unit, on the basis of the printer input/output density information generated by the printer input/output density information generating unit; and a test pattern grayscale value selecting unit that selects the test pattern grayscale value from a predetermined range of grayscale values on the basis of the visual sensitivity; wherein the unit that generates test pattern data considering visual characteristics generates the test pattern data on the basis of the test pattern grayscale value selected by the test pattern grayscale value selecting unit.