Weighted LabPQR Interim Connection Space Based on Human Color Vision for Spectral Color Reproduction

Abstract

A weighted LabPQR interim connection space, based on human color vision, is proposed for retaining more visual color information. A new weight function proposed in our paper is connected with color-matching function and then further weighted the PQR dimensions of LabPQR compared with the other two weight functions and nonweight function. The results indicated that weighting obviously improved the colorimetric representing accuracy and robustness compared with nonweighting, and the new weight function outperformed the other two weight functions. The weighted LabPQR of the new weight function is most suitable for spectral color reproduction.

Charamer mismatch-based spectral gamut mapping

“…As noted in the discussion of hybrid-space approaches in section 1, the LabPQR is a 6D ICS [12,13] in which the first three dimensions contain the CIELAB values under a particular viewing condition and the remaining dimensions are spectral reconstruction dimensions (PQR) that describe the metameric black spectrum following PCA; that is, the PQR bases, V, are derived from PCA on the metameric black spectrum P (I, P), which preserves only the first three eigenvectors approximating the spectrum. This process is expressed as…”