Patent ID: 6804025
Filing Date: 2004-10-12
Classification: H04N

Abstract:
A tone characteristic data producing device for producing tone characteristic data of an image formation device, the tone characteristic data producing device, comprising:an input unit that inputs data of a plurality of input levels to an image formation device, thereby controlling the image formation device to produce a plurality of tone patches; a measurement control unit that controls a tone measurement device to measure tone of at least two tone patches among the plurality of tone patches, thereby producing data of at least two output levels indicative of the measured tone of the at least two tone patches; a characteristic data production unit that produces tone characteristic data based on relationship between the at least two output levels and corresponding input levels; and a memory storing a standard tone characteristic data, wherein the measurement control unit includes a judgment unit that judges, for each tone patch, whether a shift, defined between the measured output level and a corresponding standard output level that is obtained based on the standard tone characteristic data, is within a predetermined range.