Patent ID: 7328958

Claim:
A method for acquiring error information indicating color drifts on a printing device having a plurality of printing heads corresponding to a plurality of types of ink and capable of printing images corresponding to printing data by making ink adhere on a printing medium, comprising the steps of: in the case where the error information is expressed by a result of comparing a first measured color data acquired by measuring in a specified color space a color of patch images printed by the printing device under a first printing condition in a standard ink recording density and a reference measured color data, acquiring a second measured color data by measuring in a specified color space a color of patch images printed by the printing device under a second printing condition different from the first printing condition in the standard ink recording density; converting the second measured color data acquired into estimated measured color data estimated to be acquired if the printing device is made to print patch images under the first printing condition and in the standard ink recording density and the color of these patch images are measured in a specified color space; and comparing the estimated measured color data and the reference measured color data.