M. Saeidi, F. Mohammadkhani Orouji, Volume 3, Issue 1 (1-2024)
Abstract
Introduction: It has already been mentioned that the concept of "approximate color temperature" shows the spectral properties and color quality of light sources that produce a discontinuous spectrum. Although this concept provides good information about the intended sources, in many cases, it seems ineffective. It is important to note that what is meant is the effect of colors under the light of these sources in the eyes of the human observer, not the camera: the visual effect of colors is not meant to be their photographic effect. Two light sources of this type may have approximately the same color temperature, but the visual effect of the colors of objects under the light of these two light sources are different. As you can see, the Cool-White-Deluxe lamp produces more red light than the Cool-White lamp, which allows objects to be seen under the light of this red lamp. Conclusion: Therefore, to have information about the visual appearance of objects under the light of such light sources (light sources with discontinuous spectrum), in addition to the concept of "approximate color temperature", we use another concept called "color reconstruction index".
