US 2017/0323460 A1 · IMAGE COLOR DATA NORMALIZATION AND COLOR MATCHING SYSTEM FOR TRANSLUCENT MATERIAL

Abstract

A shade selection program is disclosed that predicts the shade choice with the smallest CIEDE2000 color difference for dental composite resin restorations when given a backing and target shade. By utilizing generated regression models, a database of spectral reflectance information, and principles of Kubelka-Munk layering, a highly accurate shade selection program was designed. Additionally, a blending model for quantification of color adjustment potential was developed. Systems and methods for correlating RGB data from the VITA Linearguide 3D Master and VITA Bleached Guide 3D Master shade guides with their spectroradiometric correlates through a regression model while indicating a methodology for validation of accuracy of digital imaging systems are disclosed.

Claims20

Dependent claims

A method for calibrating an imaging device and the images taken from the imaging device, comprising:

acquiring images of the specimen using the imaging device;
obtaining standardized image data associated with a specimen;
extracting Red, Green and Blue (RGB) values from the images;
developing a regression model to convert the RGB values to spectral radiance, spectral reflectivity, absorption, scattering, CIELAB color coordinates, CIELAB XYZ tristimulus values, or any units of the CIE color space while normalizing to spectroradiometric accuracy;
and
calibrating the image device to the CIELAB standard color space utilizing spectral radiance, spectral reflectivity, absorption, scattering, or CIELAB color coordinates, or any units of the CIE color space,
wherein further operations on the acquired images is performed in the CIELAB standard color space or by utilizing spectral radiance, spectral reflectivity, absorption, scattering, or CIELAB color coordinates, or any units in the CIE color space.

4 more elements

Dependencies are inferred from the claim text.

Image color data normalization and color matching system for translucent material

Life of this patent

Image color data normalization and color matching system for translucent material

Life of this patent

Abstract

Claims20