Study on the Influence of Gloss on Printed Samples Medium-Small Color Difference with the Psychophysical Method of Comparison

Min, 黄敏 Huang; Lili, 王丽丽 Wang; Haoxue, 刘浩学 Liu

doi:10.3788/aos20103011.3359

Cited by 4 publications

(5 citation statements)

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“…The mean repeatability and accuracy of the observers in the acceptable tolerance experiment were 20%. The maximum W D % values of the two experiments were less than 30%, which was within the acceptable range compared to previous classical data 19,20 . Therefore, the experimental data are valid.…”

Section: Data Calculation and Processingsupporting

confidence: 75%

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Digitalization of visual discrimination threshold and acceptable tolerance of color depth by psychophysical experiments

Yang

et al. 2022

Color Research & Application

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Color depth is of great importance to both dyes and dyeing. The assessments of properties such as color fastness, relative dye strengths require dyed fabric to be adjusted to a specific depth level. However, the study of discrimination threshold and acceptable tolerance of color depth is limited. In this study, we attempted to investigate them. Acceptability (Pass/Fail) psychophysical visual experiments were performed twice by 16 normal color version observers on approximately 1206 samples for 6 standard depths in 3 hues, yielding approximately 40,000 visual assessment data points. The color depth formula, Yang3, which performed best in linearity to color depth in a previous study, was selected to calculate the color depth values YCD3 of the samples. The calculated and the visual data were bridged statistically. Experimental results show that the average discrimination threshold and acceptable tolerance of color depth are approximately 0.45 and 2.15 in YCD3, respectively. Furthermore, the details of different hues, lighter and deeper, male and female perspectives were analyzed and discussed. The Yang3 formula exhibited uniformity at different standard depths, as expected.

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Section: Data Calculation and Processingsupporting

confidence: 75%

“…The maximum W D % values of the two experiments were less than 30%, which was within the acceptable range compared to previous classical data. 19,20 Therefore, the experimental data are valid.…”

Section: Observer Uncertaintymentioning

confidence: 94%

Digitalization of visual discrimination threshold and acceptable tolerance of color depth by psychophysical experiments

Yang

et al. 2022

Color Research & Application

View full text Add to dashboard Cite

show abstract

“…The repeatability and accuracy of the observers are within the acceptable range compared to previous classical data. 23,24 Therefore, the experimental results are valid, and can be used for further studies and calculations.…”

Section: Observer Uncertaintymentioning

confidence: 82%

Investigation on the equi‐depth of color depth formulas based on color discrimination threshold and acceptable tolerance

Yang

Zhang

et al. 2023

Color Research & Application

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Accurate characterization of color depth is important for assessing a dye's relative strength, color fastness, and so on. There are several formulas for color depth, however, with evaluation effects that are quite different. In this study, we attempt to investigate the equi‐depth properties of the color depth formulas so as to provide a reference for selection. One thousand two hundred and six color samples were dyed around six standard depths of three hues in SDC Standard Depth Scales. Sixteen observers were recruited for “Pass–Fail” psychophysical experiments. More than 30 000 experimental data points were obtained to calculate the values of discrimination thresholds and acceptable tolerances at six different standard depths for each formula. The equi‐depth properties of five main color depth formulas were statistically analyzed through their coefficients of variation (CV)% values. Results show that the Yang3 formula is optimal for both color depth discrimination threshold and acceptable tolerance, and its average wrong decision is less than the minimum wrong decision of all observers, as well as those of the other four formulas. Overall, Yang3 formula shows the best equi‐depth and highest relatively accuracy among the five formulas.

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“…The reasons for this last recommendation are unknown. In some previous papers, researchers optimized the values of the parametric factors to improve the predictions made using Equation (2) while paying particular attention to the optimization of the lightness parametric factor k L [23,29,[32][33][34][35][36], as was done in the current paper.…”

Section: Optimization Of the Lightness Parametric Factor (K L )mentioning

confidence: 99%

Optimizing Color-Difference Formulas for 3D-Printed Objects

Huang

Gao

et al. 2022

Sensors

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Based on previous visual assessments of 440 color pairs of 3D-printed samples, we tested the performance of eight color-difference formulas (CIELAB, CIEDE2000, CAM02-LCD, CAM02-SCD, CAM02-UCS, CAM16-LCD, CAM16-SCD, and CAM16-UCS) using the standardized residual sum of squares (STRESS) index. For the whole set of 440 color pairs, the introduction of kL (lightness parametric factor), b (exponent in total color difference), and kL + b produced an average STRESS decrease of 2.6%, 26.9%, and 29.6%, respectively. In most cases, the CIELAB formula was significantly worse statistically than the remaining seven formulas, for which no statistically significant differences were found. Therefore, based on visual results using 3D-object colors with the specific shape, size, gloss, and magnitude of color differences considered here, we concluded that the CIEDE2000, CAM02-, and CAM16-based formulas were equivalent and thus cannot recommend only one of them. Disregarding CIELAB, the average STRESS decreases in the kL + b-optimized formulas from changes in each one of the four analyzed parametric factors were not statistically significant and had the following values: 6.2 units changing from color pairs with less to more than 5.0 CIELAB units; 2.9 units changing the shape of the samples (lowest STRESS values for cylinders); 0.7 units changing from nearly-matte to high-gloss samples; and 0.5 units changing from 4 cm to 2 cm samples.

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Study on the Influence of Gloss on Printed Samples Medium-Small Color Difference with the Psychophysical Method of Comparison

Cited by 4 publications

References 0 publications

Digitalization of visual discrimination threshold and acceptable tolerance of color depth by psychophysical experiments

Digitalization of visual discrimination threshold and acceptable tolerance of color depth by psychophysical experiments

Investigation on the equi‐depth of color depth formulas based on color discrimination threshold and acceptable tolerance

Optimizing Color-Difference Formulas for 3D-Printed Objects

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