Patent ID: 9684856
Date: 2017-06-20
CPC Classifications: G06F,G06K,H04N

Claim:
1. A method used by a control device which performs color verification of colors printed by a printer, for estimating a result of the color verification, the color verification being judging of color reproduction accuracy of the printer, the method comprising: causing a user to input conditions to be used for the color verification, through an input unit of the control device; obtaining a first set of color values which is color measurement data obtained by measurement of a color chart printed by the printer without color management; calculating a second set of color values and a third set of color values, wherein the second set of color values and the third set of color values are calculated based on the first set of color values and using data of device variation of the printer which is previously stored, such that calculation of the second set of color values and the third set of color values is performed without an additional printing of the color chart, wherein the second set of color values corresponds to the first set of color values and represents colors to be printed by the printer having a color gamut increased with a conditional change of the printer based on the previously stored data of device variation of the printer, and wherein the third set of color values corresponds to the first set of color values and represents colors to be printed by the printer having a color gamut reduced with a conditional change of the printer based on the previously stored data of device variation of the printer; creating a first printer-profile, a second printer-profile and a third printer-profile by using the first set of color values, the second set of color values and the third set of color values; on a basis of the conditions input by the user, calculating theoretical reference values of color values of a target of the color verification, by using a predetermined target profile; calculating first theoretical color values, second theoretical color values and third theoretical color values from the theoretical reference values by using the first to third printer-profiles; obtaining an estimated result of the color verification on a basis of comparison between a preset standard value and each of first to third color differences, the first to third color difference each representing a difference between the theoretical reference values and corresponding one of the first theoretical color values, the second theoretical color values and the third theoretical color values; and outputting the estimated result through the output unit of the control device.