Open AccessMETAMERISM INDEX OF LED LIGHT ON HALFTONE COLOUR IMAGES
Author(s) -
Igor Zjakić,
Ivana Ljevak,
Albulena Bilalli
Publication year - 2021
Publication title -
acta graphica
Language(s) - English
Resource type - Journals
eISSN - 1848-3828
pISSN - 0353-4707
DOI - 10.25027/agj2017.28.v30i2.197
Subject(s) - standard illuminant , incandescent light bulb , daylight , computer vision , artificial intelligence , color rendering index , color temperature , perception , computer science , optics , mathematics , computer graphics (images) , light emitting diode , psychology , physics , neuroscience
Skin face detection in photo imaging, is an important component of systems for detecting similarities in visual perception, tracing faces through illumination and metamerism. This paper presents an evaluation of the skin perception under standardized conditions of varied light sources: cool-white fluorescent “store light”, 6500K fluorescent “daylight”, and incandescent “home light”, Led light 6500 K, 2700K, 4000K CCT. In cases where the discrepancy is large, the resulting index of metamerism can be misleading. A small index of metamerism and a large change of color under illuminant metamerism has a different interpretation than what is perceived. This has been demonstrated through small colour variations in print through CMYK colors. The implication is that particular indices of metameric should only account for a limited range under different light conditions. The method used in this paper is based on visual perception, which aim to work with a wide variety of individuals, under varying lighting conditions under the influence of standard daylight, but in this case we also used the Led light 6500K correlated colour temperature, and variations of skin color tones, comparing the illuminant metamerism of visual perception based on different reflectance power distributions (SPDs).