Colorants classification

Archaeological textiles from eastern North America colorant classification, 15-43 colorant testing protocol, 29-39 coloration, literature review, 16-17... 

Y" h Laurence Poncini and Franz L. >UI Wimmer, "Color Classification of Coordination Compounds/ J. 

Figure 8.13 Neural network for color classification and color constancy. (Redrawn from Figure 6ab (page 299) from Dufort PA and Lumsden CJ 1991 Color categorization and color constancy in a neural network model of V4. Biological Cybernetics, Springer-Verlag, Vol. 65, pp. 293-303, Copyright Springer-Verlag 1991, with kind permission from Springer Science and Business Media.)...

Table I. Fabric and Stain Color Descriptions Using Munsell Color Classification...

The spectrophotometric technique is very useful for comparative purposes for a color classification system in a database and for the identification of individual organic or pearlescent (or interference) pigments or additives such as ultraviolet (UV)-absorbers batch-to-batch discrimination is also possible for analyzing the basecoats. MSP permits to measure absorption spectra in a given spectral range comprising typically 250-780 nm and to calculate... 

One of the best known color classification systems is that of Munsell which was devised in the early part of this century. The System relies on three attributes of color hue, chroma, and value. Hue refers to the color quality that is described by words like red, blue, and green in other words, the name of the color. Chroma is used to describe the purity or saturation of a color. It may be thought of as how dirty or clean a color is perceived to be. Value is the color term which we use to describe how light or dark a color is. The Munsell system plots color on a three-dimensional coordinate system in which the vertical axis represents value and the radial axis represents chroma. The various hues are arranged around the periphery of the three-dimensional solid. The Munsell Book of Color is a compilation of some 1500 painted paper chips which allow for comparison with a sample color. Approximately 100,000 colors can be distinguished in the Munsell system by interpolation [15]. A color representation of the Munsell system can be found in the books by Billmeyer and Saltzman [6], Overheim and Wagner [11], and Hunt [14] or on the Munsell homepage [16]. 

Fig. 5. Color classification of atoms according to their overlap binding ability which depends on atom electronegativity and the radial extension of the valence AO s...

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