Abstract
In this Letter, the main attributes known to affect color quality are treated statistically over a set of 118 spectra representing the current mainstream lighting technology. The color rendering index (CRI) is used to assess color fidelity while colorfulness is used to complement , supported by the growing evidence that assessment of light spectra cannot overlook color preference inputs. Colorfulness is evaluated by our optimal color () index, through a code that computes the (MacAdam) theoretical maximum volumetric gamut of objects under a given illuminant for all the spectra in our database. Pearson correlation coefficients for , the (Y. Ohno’s) color quality scale (CQS) and show a high correlation (0.950) between and , while shows the lowest correlation (0.577) with , meaning that represents the best complement to and for an in-depth study of color quality.
© 2012 Optical Society of America
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