Use of a porcelain color discrimination test to evaluate color difference formulas

Use of a porcelain color discrimination test to evaluate color difference formulas.

STATEMENT OF PROBLEM Limited studies have indicated that an alternative small color difference formula would be more appropriate for use in dentistry. PURPOSE The purposes of this study were to determine which color difference formula provides a superior degree of fit for judgments of perceptibility and acceptability and to determine if different groups of evaluators have different levels of ...

Upgrading color-difference formulas.

We propose a method to improve the prediction performance of existing color-difference formulas with additional visual data. The formula is treated as the mean function of a Gaussian process, which is trained with experimentally determined color-discrimination data. Color-difference predictions are calculated using Gaussian process regression (GPR) considering the uncertainty of the visual data...

Constructing Euclidean Color Spaces based on Color Difference Formulas

This paper shows a computational technique of how to construct a nearly isometric transformation from a color space with a non-Euclidean color difference formula into an Euclidean space. The resulting transformation is a combination of a one-dimensional color lookup table (CLUT) to transform lightness values and a two-dimensional CLUT to transform chroma and hue coordinates. As an example the C...

Color discrimination in Caspian pony

Testing CIELAB-Based Color- Difference Formulas

The CMC, BFD, and CIE94 color-difference formulas have been compared throughout their weighting functions to the CIELAB components DL*, DC*, DH*, and from their performance with respect to several wide datasets from old and recent literature. Predicting the magnitude of perceived color differences, a statistically significant improvement upon CIELAB should be recognized for these three formulas...