Color Appearance under LED Illumination: The Visual Judgment of Observers

Viénot, Françoise; Mahler, Élodie; Ezrati, Jean-Jacques; Boust, Clotilde; Rambaud, Ablane; Bricoune, Alain

doi:10.2150/jlve.32.208

Cited by 18 publications

(12 citation statements)

References 2 publications

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“…In addition, it should be noted that the global impression of a painting is also influenced by other chromatic and non-chromatic aspects, like the contrast across borders, and these are not quantified here. Also, increasing the number of colours perceived by a global expansion of the colour gamut may lead to impairment of discrimination in some regions of the space (Vienot et al, 2008;Mahler et al, 2009). However, the results presented here suggest that appropriate spectral tuning may be explored to advantage in practical illumination.…”

Section: Discussionmentioning

confidence: 99%

Chromatic effects of metamers of D65 on art paintings

Pinto

Felgueiras

Linhares

et al. 2010

Ophthalmic Physiologic Optic

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The visual impression of an artistic painting is influenced both by the colour and by the specific spectral structure of the rendering light source. The relationship between illuminant spectral structure and visual appearance assumes particular relevance with the advent of light sources with almost arbitrary spectral distribution, like modern LED based lighting. The aim of this work was to study, computationally, chromatic effects on paintings of illuminants with the same colour as D65 but different spectral profile. Hyperspectral data from twenty oil paintings were used in the analysis. A large collection of metamers of D65 was generated and the radiance reflected from each pixel of the paintings was estimated for each of the metamers. The number of discernible colours produced for each painting and illuminant was computed, and correlated with the spectral structure of the metamers. It was found that the number of colours generated varied considerably across the collection of metamers and that the metamers producing more colours were spectrally more structured, that is, less uniform. This result suggests that it may be beneficial to explore appropriate spectral tuning in practical illumination.

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Section: Discussionmentioning

confidence: 99%

Chromatic effects of metamers of D65 on art paintings

Pinto

Felgueiras

Linhares

et al. 2010

Ophthalmic Physiologic Optic

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“…A whitish color (4000-6500 K) is influential to the functions of human organs like the heart, tongue, eyes, spleen, pancreas, stomach, brain, and blood vessels [36]. Vie´not et al [35] defined a color temperature of 3000 K as LED warm light color and 6500 K as cold light color. In this study, we will discuss the related literature on recorded model numbers and factory default values of lamp tubes in stores.…”

Section: Color Temperature Of Fluorescent and Led White Lightmentioning

confidence: 99%

“…Therefore, in designing the hue angle of packaging, designers should not only take into account the uniqueness of hue angle, but make use of the property of ''white light color temperature.'' Since the light color of fluorescent lamps and LED (with RGB tubes contained) tends to turn blue-green [35], designers may apply bluegreen or green color, favorable for color presentation in high color temperature, as the major hue. Application of ''contrasting hue'' or ''complementary hue,'' when combined with red or orange, will help the beverage look bright and lively, and when combined with blue-green or green for ''analogous hue,'' will make it look refreshing and purified and become visually tasty.…”

Section: Conclusion and Suggestionmentioning

confidence: 99%

Service dimensions for consumer emotions

Wang

Chen

2011

Journal of the Chinese Institute of Industrial Engineers

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This study proposes important factors in service dimensions for consumer emotions and conducts a survey by questionnaire. We present three findings. (1) The orders of the survey results in the percentage of sample number with ''hue angle'' of beverage packaging, emotions, and impulse buying desire all showing ''analogous 4 contrasting 4 complementary.'' (2) In the questionnaire survey of emotions and impulse buying desire, ''medium color temperature,'' yellow green/green ''analogous,'' and the combination of these best aroused positive valence and desire. (3) Positive emotion dimensions can better arouse consumers' impulse buying desire compared with negative emotion dimensions. We hope the proposals for classifications of service dimensions for consumer emotions made in this article will make a contribution to both improving service quality and the research progress on consumer emotion-oriented design and service.

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“…With regard to the capability of observers to make judgements on colour difference, a visual experiment by Viénot et al. [24] showed this capability to be poor when RGB LED clusters were used as light sources. The experiment consisted of testing the colour discrimination of observers using the desaturated Lanthony‐Panel D15 (DD15) colour discrimination test illuminated with various LED clusters or with a control light.…”

Section: Introductionmentioning

confidence: 99%

Correlation of various light source quality indices with the colour discrimination capacity

Cordero

Fernández

Pérez

et al. 2011

Coloration Technology

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The quality of a light source can be measured against various criteria – colour rendering, durability, etc. Another criterion is the quality of the colour of the objects it illuminates. Traditionally, this aspect has been associated almost exclusively with that of colour rendering, but the emergence of new light‐emitting diode technology light sources has led to its being re‐examined. In particular, questions have been raised as to whether colour quality can be calculated by a single measure. Instead, it seems a multidimensional index might better cover such concepts as colour rendering, colour discrimination, harmony, etc. The present work describes a visual colour discrimination experiment whose results corroborate the existence of a multidimensional index, even although some of the parameters commonly used to describe the quality of a light source might be correlated with each other.

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Color Appearance under LED Illumination: The Visual Judgment of Observers

Cited by 18 publications

References 2 publications

Chromatic effects of metamers of D65 on art paintings

Chromatic effects of metamers of D65 on art paintings

Service dimensions for consumer emotions

Correlation of various light source quality indices with the colour discrimination capacity

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