Metamer mismatching in practice versus theory.

Metamer mismatching (the phenomenon that two objects matching in color under one illuminant may not match under a different illuminant) potentially has important consequences for color perception. Logvinenko et al. [PLoS ONE10, e0135029 (2015)] show that in theory the extent of metamer mismatching can be very significant.

XYZLMS interim connection space for spectral image compression and reproduction.

To improve the spectral image representation and reproduction accuracy, an interim connection space (ICS) was proposed. Three offset functions were defined to make up the wave regions uncovered by the CIEXYZ color matching functions. The XYZLMS ICS was determined based on the CIEXYZ and defined offset functions.

The interim connection space based on human color vision for spectral color reproduction.

To improve the spectral image color reproduction accuracy, two novel interim connection spaces (ICSs) were proposed. The dominant structure of spectral power distributions was extracted by principal component analysis for the widely used illuminants and light sources, and then further transformed to three synthetic illuminants. The CIEXYZ tristimulus under two or three synthetic illuminants was employed to construct two novel ICSs.

Reconstructing spectral reflectance by dividing spectral space and extending the principal components in principal component analysis.

Principal component analysis (PCA) is widely used to reconstruct the spectral reflectance of surface colors. However, the estimated spectral accuracy is low when using only one set of three principal components for three-channel color-acquisition devices. In this study, the spectral space was first divided into 11 subgroups, and the principal components were calculated for individual subgroups.