Threshold color differences compared to supra-threshold color differences

Kuehni, Rolf G.

doi:10.1002/(sici)1520-6378(200006)25:3<226::aid-col11>3.0.co;2-v

Cited by 12 publications

(5 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is recognized that as the magnitude of color difference increases from threshold to suprathreshold, the contours that describe equally perceived color difference change shape. [31][32][33][34] However, there is not enough data in this experiment to draw any firm conclusions about the differences in sensitivity to color difference based on the location of the color. A multiple comparison of 2-way ANOVA analysis between adjustment methods and observer expertise was performed ( Fig.…”

Section: Matching Experimentsmentioning

confidence: 84%

How well can people use different color attributes?

Zhang

Montag

2006

Color Research & Application

View full text Add to dashboard Cite

Two psychophysical experiments were conducted to analyze the role of color attributes in simple tasks involving color matching and discrimination. In Experiment I observers made color matches using three different adjustment control methods. The results showed that the Lightness, Chroma, Hue (LCH) and the Lightness, redness/ greenness, blueness/yellowness ({L, r/g, y/b}) adjustment controls elicited significantly better performance than the display RGB controls in terms of both accuracy and time, but were not significantly different from each other. Expert observers performed significantly better than naïve observers in terms of accuracy. Experiment II was a replication and extension of the experiment by Melgosa et al. [Color Res Appl 2000; 25: 356 -367] in which observers judged differences and similarities for color attributes in pairs of colored patches. At a 95% confidence level, the results from judging difference were significantly better than those from judging similarity. Hue and Lightness were significantly more identifiable than Chroma, r/g, and y/b. These results indicate that people do not have ready access to the lower level color descriptors such as the common attributes used to define color spaces, and that higher level psychological processing involving cognition and language may be necessary for even apparently simple tasks involving color matching and describing color differences.

show abstract

Section: Matching Experimentsmentioning

confidence: 84%

How well can people use different color attributes?

Zhang

Montag

2006

Color Research & Application

View full text Add to dashboard Cite

show abstract

“…Figure 3(C) shows that the reddish-yellow (hue angle of 45°) was the hardest color to make a match, while the greenish-blue (hue angle of 195°) was the easiest with significantly better performance than the reddish-yellow and the yellowish-green (hue angle of 125°). [31][32][33][34] However, there is not enough data in this experiment to draw any firm conclusions about the differences in sensitivity to color difference based on the location of the color. There is a trend [see Fig.…”

Section: Matching Experimentsmentioning

confidence: 84%

How well can people use different color attributes?

Zhang

Montag

2004

Journal of Vision

View full text Add to dashboard Cite

“…Thus, the last CIE recommendation for industrial colordifference evaluation 22 has been suggested for moderate color differences between 0 -5 CIELAB units and changes between threshold and suprathreshold color difference perception have also been reported. 23 On this basis, it might also be asked whether the distinction of the color attributes varies with the magnitude of the color difference, and this was considered in the design of our two experiments, as explained before. In our case, given that we based our experiments on samples from the Munsell atlas, 5 the color differences of the pairs in all cases were far greater than thresholds, as indicated by the second column of Tables I and II.…”

Section: Magnitude Of Color Differencesmentioning

confidence: 99%

Are we able to distinguish color attributes?

et al. 2000

View full text Add to dashboard Cite

The perception and understanding of the three color attributes have been analyzed from two experiments using pairs of Munsell samples, where only one of the three color attributes were changed/unchanged (Experiment I/II) at a time. In each experiment, 36 pairs with color differences of 3 different sizes (average values of 15.8 and 21.7 CIELAB units for Experiments I and II, respectively) were assessed under standardized conditions by 40 normal observers, 20 of them with previous knowledge and experience in colorimetry. At a 95% confidence level, the results from the two experiments were not significantly different, indicating that color attributes were not easily distinguished:for example, for experienced observers, the percentage of correct answers for identifying the color attribute responsible for a color difference was only 72.4%, the random probability being 33.3%. There were no significant differences between the results found by men and women. The worst distinguished attribute was Chroma, that is, the least frequent confusion was between Hue and Value or vice versa. Value differences were more easily detected for achromatic than for chromatic pairs, both for experienced and inexperienced observers. With respect to the size of the color differences, we observed that large hue differences were more easily identifiable than smaller ones, and a constant Hue was more identifiable when the entire color difference was small.

show abstract

Threshold color differences compared to supra-threshold color differences

Cited by 12 publications

References 6 publications

How well can people use different color attributes?

How well can people use different color attributes?

How well can people use different color attributes?

Are we able to distinguish color attributes?

Contact Info

Product

Resources

About