𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Investigation of parametric effects using large colour differences

✍ Scribed by Shing–Sheng Guan; M. Ronnier; Luo

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
355 KB
Volume
24
Category
Article
ISSN
0361-2317

No coin nor oath required. For personal study only.

✦ Synopsis

Sixty-five wool sample pairs around eight colour centers were used to investigate the change of colour differences caused by four viewing parameters: lightness of background, sample separation, luminance, and magnitude of colour difference. The average size of colour difference was 13 CIELAB ⌬E units. Each pair was assessed 20 times by a panel of 13 normal colour-vision observers using the gray scale psychophysical method. The viewing parameters investigated did not greatly affect the perceived colour difference. The largest discrepancy was found between the gray and white background conditions, i.e., the same pair of samples shows a 30% larger colour difference against a white background than against a gray background. The present results were also used to compare with those of the authors' earlier study 2 using small colour differences. It showed that there is a large difference in characteristics between the large and small colour differences. The visual data were also used to test five colour-difference formulae: CIELAB, CMC, BFD, CIE94, and GLAB. The results showed that the GLAB formula, developed by the authors, performed marginally better than the other formulae.

📜 SIMILAR VOLUMES

Investigation of parametric effects usin
Investigation of parametric effects using small colour differences
✍ Shing–Sheng Guan; M. Ronnier Luo 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 260 KB

This experiment was carried out to investigate some viewing parameters affecting perceived colour differences. It was divided into eight phases. Each phase was conducted under a different set of experimental conditions including separations, neutral backgrounds, and psychophysical methods. Seventy-f

The use of sensory difference tests to i
The use of sensory difference tests to investigate perceptible colour-difference in a cosmetic product
✍ Roger Whiting; Shona Murray; Zyrene Caintic; Kirsteen Ellison 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 172 KB 👁 1 views

## Abstract Two sensory difference tests have been used to assess the ability of an untrained population to perceive colour difference in a cosmetic product. The two tests used were the triangle test and the “two‐out‐of‐five” test. Participants were presented with groups of samples with varying col

Some aspects of the visual scaling of la
Some aspects of the visual scaling of large colour differences—II
✍ G. G. Attridge; M. R. Pointer 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 150 KB 👁 1 views

In an earlier article the authors related visuallyscaled large colour differences to ⌬E\* values calculated using four colour-difference formulae. All four metrics yielded linear regressions from plots of visual colour difference against ⌬E\*, and ⌬E\* 94 gave the best linear fit, but the correlatio