IMAGING DEVICE, COLORIMETRY DEVICE, AND IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To enhance colorimetric accuracy inexpensively and easily.SOLUTION: A colorimetry device includes: a storage section 56 for storing a plurality of colors constituting a reference chart as predetermined color space colorimetric values independent of a device; an imaging section 42 for obtaining an RGB value of the reference chart and an RGB value of an object by concurrently imaging the reference chart and the object as a colorimetric target; an RGB value searching section 534 for searching for RGB values of at least four points of the reference chart constituting apexes of a polyhedron including the RGB value of the object in an RGB color space; a linear matrix calculation section 535 for calculating a linear conversion matrix that converts the RGB values of the four points of the reference chart to the colorimetric values stored in the storage section 56 corresponding to the RGB values of the four points; and a colorimetric value calculation section 531 for converting the RGB value of the object to a colorimetric value corresponding to the RGB value of the object in the predetermined color space on the basis of the linear conversion matrix.SELECTED DRAWING: Figure 7