초록 ▼

Methods and systems for measuring with a Color Measurement System of predetermined specification and evaluating the color of skin, teeth, hair and material substances with a Color Index. The principles of this invention also relate to techniques for using such a Color Measurement System with the Col

Methods and systems for measuring with a Color Measurement System of predetermined specification and evaluating the color of skin, teeth, hair and material substances with a Color Index. The principles of this invention also relate to techniques for using such a Color Measurement System with the Color Index in medical applications such as the detection of chromogenic disease including bilirubin infant jaundice, cosmetics applications and in the evaluation of the color of hair or teeth, and other applications. The Color Index is measured and calculated from the reflectance spectrum of any skin (or teeth, hair or material substance) by a two step process. The first step is the weighting of the visible spectra with a unique set of weighting factors which calculate a sample's reflectance spectrum's contribution to the appearance of four color components independent of the illuminating condition. The second step places the sample's reflectance spectrum's contribution to the appearance of the four color components in opponency to each other and calculates the Color Index providing attributes representative of correlates of lightness-darkness (L, also referred to as lightness), redness-greenness (M) and yellowness-blueness (N).

대표청구항 ▼

[ The invention claimed is:] [1.] A method for evaluating color of a sample using a Color Measurement System with a Color Index, said method comprising:measuring said sample's reflectance spectrum using a color measuring instrument;weighting said reflectance spectrum with weighting factors correspon

[ The invention claimed is:] [1.] A method for evaluating color of a sample using a Color Measurement System with a Color Index, said method comprising:measuring said sample's reflectance spectrum using a color measuring instrument;weighting said reflectance spectrum with weighting factors corresponding to four color components that form two opponent pairs of color components wherein said weighting factors are used to calculate said sample's reflectance spectrum's contribution to said four color components' appearance; anddetermining individual contributions corresponding to each of said four color components and calculating said Color Index using said individual contributions and respective contributions to each of a respective one of said four color components by a perfect diffuser, said determining comprising:summing said sample's reflectance spectrum's contribution to the appearance of each of a respective one of said four color components at a plurality of wavelengths into said individual contributions corresponding to each of said four color components that form said two opponent pairs of color components.