Abstract
The strip comparison method, based on the serial exploration method described by Torgerson [Theory and Methods of Scaling; Wiley & Sons (1958); Chap. 7], for the development of near-threshold color difference models was presented and validated with theoretical data by the authors in a previous work. In this study, we investigate parametric effects derived from the use of the strip comparison method on chromaticity-discrimination ellipses around the red CIE color center. The results obtained led to the conclusion that the strip comparison method has little effect on the parameters of the chromaticity-discrimination ellipses determined by the pair comparison method when pairs of patches in the strips are separated by a black line 0.5 mm thick or are separated by 3 mm spacing on a white background and also correlates well with the parameters reported by other authors using the pair comparison method at the threshold.
Highlights
This study proposes the use of the Strip Comparison Method (SCM), based on the serial exploration method described by Torgerson [30], the description and validation with theoretical data of which was presented in a previous paper [31]
Once the frequency data had been collected by the strip method, the strips were cut into individual pairs and three new assessments were performed for each set by Pair Comparison (PCM), by the same panel of observers that performed the strip assessment
The results obtained enable us to conclude that the strip method has little e ect on the tilt of the chromaticity-discrimination ellipses, determined by the pair method, for sets with a black line spacing of 0.5 mm or with a spacing of 3 mm on a white background
Summary
Since the CIE committee 1.3 (colorimetry) established guidelines for the scientific community for research in the field of color-di erence assessment in a coordinated manner (Robertson [1]), many studies in the field of color-di erence models have been conducted [2,3,4,5,6,7,8,9,10,11,12] and added to previous studies developed by MacAdam, Wyszecki, and others [13,14,15,16]. After the publishing of a second set of CIE guidelines for coordinated future work on industrial color-di erence evaluation (Maier [17]), Melgosa [18], chairman of the CIE committee 2.3, made a third call in 2007 to collect new datasets to complement those used to develop the CIEDE2000 [19,20] color-di erence formula in order to develop new uniform color spaces to which colordi erence formulas could be associated to improve their applicability in industrial environments. The psychometric tests needed to evaluate the sensation of color di erence usually require significant concentration from the observers, which often extends the duration of the tests, complicating the recruitment of volunteers. It is, interesting to develop new methods that will simplify and shorten the decision-making process during psychometric tests
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