Assessing the temporal uniformity of CIELAB hue angle

Xiangzhen Kong, Minchen Wei (Corresponding author), M.J. Murdoch, Ingrid M.L.C. Vogels, Ingrid E.J. Heynderickx

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In recent work [J. Opt. Soc. Am. A 36, 1022 (2019)], we found that ΔE∗ab/s in CIELAB is not suitable for describing the perceived speed of temporal color changes in full-room illumination. Two hue transitions with the same physical speed of change, in terms of ΔE∗ab/s, were not perceived to change at the same speed. This is not really surprising, since CIELAB was not designed to characterize the perception of temporal color transitions in illumination. In this study, we further investigate the temporal uniformity of CIELAB. The stimuli were presented in a square of 4.3° visual angle surrounded by a 4000 K adapting field, similar to the viewing condition for which CIELAB was designed (i.e., where color stimuli are presented on-axis surrounded by a static adaptation field). The human observers viewed pairs of temporal color transitions which were presented sequentially, and were asked to select the one that appeared to change faster. The results confirmed that under these conditions CIELAB was also not temporally uniform. We present preliminary attempts to improve the temporal uniformity for both CIELAB and cone-excitation spaces (i.e., LMS and DKL (Derrington–Krauskopf–Lennie [J. Physiol. 357, 241 (1984)]).
Original languageEnglish
Pages (from-to)521-528
Number of pages8
JournalJournal of the Optical Society of America A, Optics, Image Science and Vision
Issue number4
Publication statusPublished - 1 Apr 2020

Bibliographical note

Funding Information:
Research Grants Council, University Grants Committee, of the Hong Kong Special Administrative Region, China (PolyU 152063/18E). We thank the staff and students at The Hong Kong Polytechnic University for their participation in the experiment. We also would like to thank the two anonymous reviewers whose comments/suggestions helped improve and clarify this paper.


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