US 6,604,466 B2 · Color management method and apparatus for printing press

Abstract

In a color management method for a printing press, colorimetic values of a first patch for generating a profile printed by the printing press are measured, so that a printing press profile representing a color reproduction characteristic of the printing press is generated from the measured colorimetic values of the first patch and a dot area percent of each ink color predetermined in correspondence with the first patch. Colorimetic values of a second patch for determining stability of the printing press printed by the printing press are measured. The measured colorimetic values of the second patch is compared with colorimetic values, in the printing press profile, having a dot area percent substantially equal to a dot area percent of each ink color predetermined in correspondence with the second patch. A warning is generated on the basis of a comparison result. A color management apparatus for a printing press is also disclosed.

Claims11

Dependent claims

A color management method for a printing press, comprising the steps of:

measuring colorimetic values of a first patch for generating a profile printed by the printing press, and generating a printing press profile representing a color reproduction characteristic of the printing press from the measured colorimetic values of the first patch and a dot area percent of each ink color predetermined in correspondence with the first patch;
measuring colorimetic values of a second patch for determining stability of the printing press printed by the printing press;
comparing the measured colorimetic values of the second patch with colorimetic values, in the printing press profile, having a dot area percent substantially equal to a dot area percent of each ink color predetermined in correspondence with the second patch;
and
generating a warning on the basis of a comparison result.

2 more elements

A color management apparatus for a printing press, comprising:

measurement means for measuring at least color data of a first patch for generating a profile and a second patch for determining a stability of the printing press, which are printed by the printing press;
colorimetic value calculation means for calculating the colorimetic values of each of the first and second patches from the color data output from said measurement means;
profile generation means for generating a printing press profile, representing a color reproduction characteristic, on the basis of the colorimetic values of the first patch output from said colorimetic value calculation means and a dot area percent of each ink color predetermined in correspondence with the first patch;
colorimetic value comparison means for comparing the colorimetic values of the second patch output from said colorimetic value calculation means with colorimetic values, in the printing press profile, having a dot area percent substantially equal to a dot area percent of each ink color predetermined in correspondence with the second patch;
and
alarm means for generating a warning on the basis of a comparison result output from said colorimetic value comparison means.

3 more elements

Dependencies are inferred from the claim text.

Color management method and apparatus for printing press

Life of this patent

Color management method and apparatus for printing press

Life of this patent

Abstract

Claims11