A study of preferred colour rendering of light sources: Home lighting

Szabó, Ferenc; Kéri, R; Schanda, J.; Csuti, Péter; Mihálykó-Orbán, E

doi:10.1177/1477153514555536

Cited by 31 publications

(28 citation statements)

References 12 publications

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“…This statement highlights the superiority of the real scene experiments, where the psychophysical studies were conducted under immersive conditions. 14,17,[20][21][22][23][24] Meanwhile, contrary to the real scene experiments which focus on certain targeted cases, the proposed empty-light-booth approach could serve as a universally applicable method for characterizing the colour preference of lighting for general conditions.…”

Section: Resultsmentioning

confidence: 99%

Evaluating colour preference of lighting with an empty light booth

Liu

Huang

Luo

et al. 2017

Lighting Research & Technology

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In our recent work, the colour preference of several LED white lights with different correlated colour temperatures (CCT) was investigated with a wide selection of objects. The results highlighted the dominant effect of light itself on the colour preference of lighting. In this study, we similarly implemented two psychophysical experiments with the same lights but with nothing in the light booth. It was found that the subjective ratings for the lit environment of the empty booth were quite close to those of the previous studies that used various coloured objects. Such a finding corroborates our former conclusion that light dominates colour preference and we suspect that this finding can be attributed either to the colour memory of the observers or to the subconscious effect of human vision. Thus, it seems that for general multi-CCT conditions where the light sources do not have very different gamut shapes or object desaturation/oversaturation properties, the preferred white light could be determined by simply asking the observers to rate their preference for the lit environment of the empty light booth. To verify this wild and interesting conclusion and further clarify its applicability, follow-up studies are needed.

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Section: Resultsmentioning

confidence: 99%

Evaluating colour preference of lighting with an empty light booth

Liu

Huang

Luo

et al. 2017

Lighting Research & Technology

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“…In this case, we would like to conclude that unlike lighting fidelity which should be correlated with certain reference light source, colour preference is to some extent an absolute issue and thus should be quantified by some absolute measures. Another possible explanation for the results in Figure 5 is that colour preference is correlated with saturation 22,32,37 while the increased gamut area is always related to saturation (or chroma) enhancement 6,9,21,23,53 . Maybe that is why in some related works 2,11,23 the GAI was reported to be a good predictor for colour preference (the CDI and CSA are also gamut based metrics, but were less discussed in past studies).…”

Section: Correlation Analysismentioning

confidence: 95%

“…Such a design may unpremeditatedly help to reveal the influence of other contextual factors on colour preference, since it relatively weakens the impact of light when compared to the conditions where CCT differs. However, unlike colour fidelity, colour preference should not be restricted by a reference light source, since in many cases people actually want to choose a favorite light irrespective of the CCT 4,26,[33][34][35][36][37] . Secondly, the experimental object is also an important concern.…”

Section: Introductionmentioning

confidence: 99%

Light dominates colour preference when correlated colour temperature differs

Huang

Liu

Westland

et al. 2017

Lighting Research & Technology

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Colour preference of lighting is generally influenced by three kinds of contextual factors, which are the features of light, object and observer. In this study, a series of psychophysical experiments were conducted to investigate and compare the effect of certain factors on colour preference, including spectral power distribution of light, lighting application, observers' personal colour preference, regional cultural difference and gender difference. Certain LED lights with different correlated colour temperatures were used to illuminate a wide selection of objects. Participant response was quantified by a 7-point rating method or a 5-level ranking method. It was found that the preferred illumination for different objects exhibited a similar trend and the influence of light was significantly stronger than that of other factors. Therefore, we conclude that the light itself (rather than, for example, the objects that are viewed) is the most crucial factor for predicting which light, among several candidates with different CCTs, an observer will prefer. In addition, some of the gamut-based colour quality metrics correlated well with the participants' response, which corroborates the viewpoint that colour preference is strongly influenced by colour saturation. Moreover, the familiarity of the object affects the ratings for each experiment while the colour of the objects also influences colour preference.

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“…In order to confirm the excellent predictive performance of the new metric proposal, the experimental data of several different psychophysical studies on the perception of colour preference in metameric and multi-CCT lighting scenarios were collected (Jost-Boissard 2009, Jost-Boissard 2015, Wei 2014, Szabó 2016, Smet 2010a, VanRie 2009, Imai 2012, Imai 2013, Jost 2013, Tsukitani 2013, Lin 2016, Houser 2005, Huang 2018, Narendran 2002, Wang 2017) and a comprehensive meta correlation-analysis as proposed by Hunter and Schmidt (Hunter 2004) was eventually performed on these data to evaluate and compare the predictive power of the MCPI in terms of visual appreciation with those of other colour quality metrics. These included Sanders' preferred colour index (Sanders 1959a), Judd's flattery index .…”

Section: Results Of the Meta-correlation Analysismentioning

confidence: 99%

A New Metric for Memory Colour Preference Evaluation in Lighting Applications - Experiments, Mathematical Definition, and Comparison With Other Colour Rendering Indices

Babilon

Khanh

2019

PROCEEDINGS OF the 29th Quadrennial Session of the CIE

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Due to their potential use as an internal reference, memory colours have proven to provide an excellent conceptional approach for the colour 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 colour quality metrics. For this reason, a new experiment was devised trying to overcome the shortcomings of these previous approaches. Based on the experimental output, the main goal of the current study consequently was to derive an improved version of a memory-based colour quality metric, which provides 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 colour fidelity.

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A study of preferred colour rendering of light sources: Home lighting

Cited by 31 publications

References 12 publications

Evaluating colour preference of lighting with an empty light booth

Evaluating colour preference of lighting with an empty light booth

Light dominates colour preference when correlated colour temperature differs

A New Metric for Memory Colour Preference Evaluation in Lighting Applications - Experiments, Mathematical Definition, and Comparison With Other Colour Rendering Indices

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