Patent ID: 8339665
Filing Date: 2012-12-25
Classification: G01J,G06T

Abstract:
1. A method of producing a paint color texture map in which a plurality of paint colors are arranged on a two-dimensional plane using coordinate axes of two parameters that represent color and texture of the paint colors, the method comprising: determining at least three characteristic quantities, using a plurality of spectral reflectances measured at a plurality of light-receiving angles, for each of the plurality of paint colors; subjecting a data group including the at least three characteristic quantities to principal component analysis so as to determine a First Principal Component and Second Principal Component expressed as linear expressions, using the characteristic quantities; calculating values of the First Principal Component and Second Principal Component for the plurality of paint colors; and positioning the paint colors on a two-dimensional plane which has the First Principal Component and Second Principal Component as the two parameters and has values of the First Principal Component and Second Principal Component as coordinates, wherein: the characteristic quantities are selected from the group consisting of IV (intensity value) value, SV (scattering value) value, FF (flip flop) value, cFF (chroma flip flop) value, metallic appearance index, appearance depth index, and Definition; the IV value is Value Y (brightness) in the XYZ color space determined by a spectral reflectance measured at a deflection angle 15 degree; the SV value is Value Y in the XYZ color space determined by a spectral reflectance measured at a deflection angle 45 degree; the FF value is determined by 2×(Y the cFF value is determined by 2×(c* the metallic appearance index is determined by Y the Definition is determined by sqrt (L*R