[article]
| Titre : |
Determination of dyers' perceived components of colour difference (depth, brightness and hue) between two similar colours from their spectral reflectance values |
| Type de document : |
texte imprimé |
| Auteurs : |
Roger H. Wardman, Auteur ; Salma Farooq, Auteur ; Ken J. Smith, Auteur |
| Année de publication : |
2012 |
| Article en page(s) : |
p. 161-168 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Algorithmes
Colorimétrie
Spectroscopie de réflectance
Teinture -- Fibres textiles
|
| Index. décimale : |
667.3 Teinture et impression des tissus |
| Résumé : |
The partitioning of colour differences into ΔL*, ΔC* and ΔH* is not directly equivalent to the dyer’s method of partitioning. The dyer’s method involves separation into the components of depth (ΔD), brightness (ΔB) and hue (ΔH), of which only hue difference has a qualitative (and quantitative) equivalent in the CIELAB system. Depth and brightness are important terms to dyers. Depth is related to the amount of dye taken up by a textile material and brightness to that component of colour difference that is neither depth nor hue. Brightness is best defined as the opposite of dullness, dullness being related to the amount of neutral grey present in the colour. An algorithm, called the Wardman–Smith–Farooq algorithm, has been developed to compute the dyers’ variables of ΔD,ΔB and ΔH from spectral reflectance values, enabling dyers to take full advantage of colorimetry. The algorithm is based on extensive experimental work to map surfaces of constant visual depth through the colour space and this paper describes the methodology of the calculation. The correlations of the values of ΔD,ΔB and ΔH, determined using the Wardman–Smith–Farooq algorithm with other empirical models for 117 sample pairs, are given. |
| Note de contenu : |
- EXPERIMENTAL : Development of the WSF algorithm - Stages of the algorithm
- RESULTS AND DISCUSSION : Comparison with the DBH and sato models - Performance of the WSF algorithm with visual assessments |
| DOI : |
10.1111/j.1478-4408.2012.00372.x |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15114 |
in COLORATION TECHNOLOGY > Vol. 128, N° 3 (2012) . - p. 161-168
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