PURPOSE To investigate the influence of color vision on myopia development by testing refraction error and axial length of the eye for high school students with and without color vision deficiency (CVD). METHODS A school-based cross-sectional, cluster sample study was conducted to test the color vision and refractive error of 16,539 high school students. Students were screened for CVD using a...

The color of serpentine jade is affected not only by the chemical composition, but also some external factors. In this research, we quantitatively analyzed and influence light sources, backgrounds, thickness on its color. Thirty-six gem-quality samples from Tai’an, Shandong, China, were studied using eighteen Munsell neutral gray three sources (D65, F2, A). It was found that D65 source appeared...

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. This paper examines metamer mismatching in practice by computing the volu...

Protanomaly is a common abnormality of color vision in which the long wavelength sensitive cone is lacking. Protanomalous observers are trichromatic with reduced ability to discriminate colors in the red-green part of the spectrum because the photopigments that mediate discrimination in this range are abnormally similar differing in one of two ways; first, by only a few nanometers in peak sensi...

This article proposes an illuminant estimation algorithm that estimates the spectral power distribution of an incident light source from a single image. The proposed illumination recovery procedure has two phases. First, the surface spectral reflectances are recovered. In this case, the surface spectral reflectances recovered are limited to the maximum achromatic region (MAR) which is the most ...

Color gamuts of acrylic paints generated by paint mixing and varnishing is introduced. A colorant data including unit k, unit s, and Saunderson coefficients, K1 and K2, are optimized. The simulation result of paint gamut rendering contradicts a belief of color mixing theory that yellow, blue, and red primaries produces any green. In addition, a statistic gloss model shows that varnishing makes ...