A New Approach to the Metamerism Phenomenon in the Frequency Domain

Abstract

In this investigation, the behavior of crossover points of spectral reflectance of metameric pairs in the frequency domain has been studied. Also the general metameric index has been calculated using a power spectrum by Fourier transformation. Correlation between these results and the results of current methods was studied. Results show that the transformation of spectral reflectance differences of metameric pairs in the frequency domain could be considerable. This new approach is regarded as a useful method to investigate the metamerism phenomenon.

Metamerism and shade sorting

“…In general, these indices failed to show any promising correlation with visual assessment (Chow et al , 1999). Moradian and Rigg (1987) suggested the use of the lightness index of Wyszecki ( L λ = 25 (R λ ) 1/3 − 17) instead of refl ectance and the index becomes (Equation [5.18]): Khodadadi et al (2007) calculated general MI using a power spectrum by Fourier transformation of spectral refl ectance differences. This new approach is claimed to be a useful method to investigate the metamerism phenomenon.…”