Technische Universität Darmstadt
On the Color Rendition of White Light Sources in Relation to Memory Preference.
Degree: PhD, 18 Department of Electrical Engineering and Information TechnologyInstitute for Electromechanical DesignLight Technology, 2018, Technische Universität Darmstadt
Due to their potential use as an internal reference, memory colors have proven to provide an excellent conceptional approach for the color rendition evaluation of white light sources in terms of predicting visual appreciation. However, there are still some major drawbacks that can be identified in the principal design of existing memory-based or memory-related color quality metrics, of which the most severe is most likely that none of them were devised under realistic adaptation and viewing conditions. With the aim of contributing to a more comprehensive understanding of the nature of memory colors, a new experimental approach based on the color appearance rating of real familiar test objects perceived in a more realistic contextual viewing environment should therefore be presented as a main part of the current thesis trying to overcome the shortcomings of previous work. Besides attempting to draw universally valid conclusions about the memory colors' general characteristics, additional focus should be on the investigation of the impact of both the white point of adaptation and the observers' cultural background on the memory color assessments. By providing a comprehensive statistical analysis of the experimental data, it is shown that a significant effect on the observers' color appearance ratings can be reported for these two potential impact factors. With the corresponding dependencies being eventually known, a further goal of the current work should be the development of an improved memory-based color quality metric providing a superior tool for developers and manufacturers that can be used for the optimization of state-of-the-art lighting solutions in cases where visual appreciation and high user acceptability are more important than color fidelity. In order to validate the excellent predictive performance of this new metric proposal, the results of a comprehensive meta-correlation analysis based on the data of several different psychophysical studies are additionally reported. From this evaluation, it can be concluded that the newly proposed color quality metric outperforms all alternative approaches considered in the analysis making it an excellent choice to finally replace the CIE general color rendering index (Ra) in its use as an optimization criterion for modern light sources to achieve high visual appreciation and observer preference for which the latter has actually not been intended at all.
Advisors/Committee Members: Khanh, Tran Quoc (advisor), Dörsam, Edgar (advisor).
to Zotero / EndNote / Reference
APA (6th Edition):
Babilon, S. (2018). On the Color Rendition of White Light Sources in Relation to Memory Preference. (Doctoral Dissertation). Technische Universität Darmstadt. Retrieved from http://tuprints.ulb.tu-darmstadt.de/7799/
Chicago Manual of Style (16th Edition):
Babilon, Sebastian. “On the Color Rendition of White Light Sources in Relation to Memory Preference.” 2018. Doctoral Dissertation, Technische Universität Darmstadt. Accessed December 14, 2018.
MLA Handbook (7th Edition):
Babilon, Sebastian. “On the Color Rendition of White Light Sources in Relation to Memory Preference.” 2018. Web. 14 Dec 2018.
Babilon S. On the Color Rendition of White Light Sources in Relation to Memory Preference. [Internet] [Doctoral dissertation]. Technische Universität Darmstadt; 2018. [cited 2018 Dec 14].
Available from: http://tuprints.ulb.tu-darmstadt.de/7799/.
Council of Science Editors:
Babilon S. On the Color Rendition of White Light Sources in Relation to Memory Preference. [Doctoral Dissertation]. Technische Universität Darmstadt; 2018. Available from: http://tuprints.ulb.tu-darmstadt.de/7799/