Gradation correction curve producing method, gradation correction curve producing apparatus, and gradation correction curve producing program storage medium

A gradation correction curve evaluation result display program storage medium storing a gradation correction curve evaluation result display program which causes a computer to operate as a gradation correction curve evaluation result display apparatus for displaying an evaluation result of a gradation correction curve for correcting a gradation of an image, when the gradation correction curve evaluation result display program is executed in the computer system, wherein said gradation correction curve evaluation result display program storage medium stores the gradation correction curve evaluation result display program comprising:

• a patch data producing section for producing monochromatic patch data representative of a plurality of monochromatic density patches for each of monochromes, and gray patch data representative of a plurality of gray density patches for a gray in which the monochromes are combined;
• and
• a gradation correction curve computing section for obtaining density measurement data of the plurality of monochromatic density patches outputted in accordance with the monochromatic patch data produced in said patch data producing section and obtaining colorimetry data of the plurality of gray density patches outputted in accordance with the gray patch data produced in said patch data producing section to determine a gradation correction curve for each monochrome for gradation correction using a first gradation correction curve for each monochrome obtained by the density measurement data, and a second gradation correction curve for each monochrome determined from the colorimetry data.