Modelling memory colour region for preference colour reproduction

Zeng, Huanzhao; Luo, Ronnier

doi:10.1117/12.835862

Cited by 12 publications

(16 citation statements)

References 15 publications

(25 reference statements)

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“…Memory colors have been used successfully in the past as an internal reference to study the color rendering of white light sources [53,54] or image color quality [55][56][57]. MCM is analogous to other approaches based on internal references often used in color constancy research, such as achromatic matching and unique hue setting.…”

Section: Memory Color Matching (Mcm)mentioning

confidence: 99%

Study of chromatic adaptation using memory color matches, Part I: neutral illuminants

et al. 2017

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Twelve corresponding color data sets have been obtained using the long-term memory colors of familiar objects as target stimuli. Data were collected for familiar objects with neutral, red, yellow, green and blue hues under 4 approximately neutral illumination conditions on or near the blackbody locus. The advantages of the memory color matching method are discussed in light of other more traditional asymmetric matching techniques. Results were compared to eight corresponding color data sets available in literature. The corresponding color data was used to test several linear (von Kries, RLAB, etc.) and nonlinear (Hunt & Nayatani) chromatic adaptation transforms (CAT). It was found that a simple two-step von Kries, whereby the degree of adaptation D is optimized to minimize the DEu'v' prediction errors, outperformed all other tested models for both memory color and literature corresponding color sets, whereby prediction errors were lower for the memory color sets. The predictive errors were substantially smaller than the standard uncertainty on the average observer and were comparable to what are considered just-noticeable-differences in the CIE u'v' chromaticity diagram, supporting the use of memory color based internal references to study chromatic adaptation mechanisms.

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Section: Memory Color Matching (Mcm)mentioning

confidence: 99%

Study of chromatic adaptation using memory color matches, Part I: neutral illuminants

et al. 2017

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“…These results indicate that natural and other familiar objects always tend to be perceived in their typical memorized color. By providing cues to the visual system, which may serve as an internal reference, memory colors are therefore considered to play a crucial role for the mechanisms of color constancy and color appearance under varying illumination conditions as well as for color reproduction and color rendering applications …”

Section: Introductionmentioning

confidence: 99%

Color appearance rating of familiar real objects under immersive viewing conditions

Babilon

Khanh

2018

Color Research & Application

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With the concept of memory colors being considered to play a crucial role for many imaging and lighting applications, the questions how people assess the color appearance of familiar objects and what kind of fundamental characteristics can be derived from these assessments have extensively been studied in the past. However, all of the previous studies, the authors of this article are aware of, lack in realistic viewing and adaptation conditions. In the attempt of overcoming these deficiencies, a new experiment investigating the impact of long‐term memory on the color appearance ratings of 12 familiar test objects was performed. The pooled observer data were modeled in CIECAM02 color space using bivariate Gaussian functions whose centroids define the corresponding memory color centers for each test object. Comparisons with previous results obtained by Smet et al. revealed no significant differences in the reported memory color centers, but showed distinct deviations in the covariance matrices defining the shape of the fitted distribution functions. It is supposed that this new set of functions will lead to significantly different results when being used for the construction of an updated memory‐based color quality metric.

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“…Memory and preferred colors have also been suggested or used as an internal reference to assess object color appearance and color quality in color reproduction [21][22][23][24][25][26][27][28] and color rendering [11,12,29,30].…”

Section: Introductionmentioning

confidence: 99%

Cross-cultural variation of memory colors of familiar objects

Smet¹,

Lin²,

Nagy³

et al. 2014

Opt. Express

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Abstract:The effect of cross-regional or cross-cultural differences on color appearance ratings and memory colors of familiar objects was investigated in seven different countries/regions -Belgium, Hungary, Brazil, Colombia, Taiwan, China and Iran. In each region the familiar objects were presented on a calibrated monitor in over 100 different colors to a test panel of observers that were asked to rate the similarity of the presented object color with respect to what they thought the object looks like in reality (memory color). For each object and region the mean observer ratings were modeled by a bivariate Gaussian function. A statistical analysis showed significant (p < 0.001) differences between the region average observers and the global average observer obtained by pooling the data from all regions. However, the effect size of geographical region or culture was found to be small. In fact, the differences between the region average observers and the global average observer were found to of the same magnitude or smaller than the typical within region inter-observer variability. Thus, although statistical differences in color appearance ratings and memory between regions were found, regional impact is not likely to be of practical importance.

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Modelling memory colour region for preference colour reproduction

Cited by 12 publications

References 15 publications

Study of chromatic adaptation using memory color matches, Part I: neutral illuminants

Study of chromatic adaptation using memory color matches, Part I: neutral illuminants

Color appearance rating of familiar real objects under immersive viewing conditions

Cross-cultural variation of memory colors of familiar objects

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