| 释义 |
chromaticity|krəʊməˈtɪsɪtɪ|
[f. chromatic + -ity.]
1. Biol. [ad. F. chromaticité.] The amount or state of chromatin.
1904tr. L. Launoy in Jrnl. R. Microscop. Soc. Apr. 170 Active phenomena [in poison- or digestive glands]—variations of chromaticity [etc.]. 1934L. W. Sharp. Introd. Cytol. (ed. 3) xiii. 195 Small bodies in the cytoplasm which resemble nuclear matter in composition and chromaticity.
2. Optics. (See quot. 1922.) Also attrib. chromaticity co-ordinates, co-ordinates in a chromaticity diagram; chromaticity diagram, = colour triangle (see colour n. 19).
1922L. T. Troland in Jrnl. Opt. Soc. Amer. VI. 535 The term chromaticity may be used to characterize a color qualitatively without reference to its brilliance. Chromaticity is determined by hue and saturation together, a gray being specified by the statement that it has no chromaticity. 1932Hardy & Perrin Princ. Optics xiv. 306 To specify the color of a material completely, it is necessary to give not only the chromaticity but also the luminosity. 1944W. D. Wright Measurement of Colour iii. 60 The chromaticity diagram in which the colour quality of a stimulus is defined in terms of two co-ordinates. 1951Engineering 27 July 105/1 Their new colorimeter..suitable for measuring..chromaticity co-ordinates. 1955G. G. Gouriet Introd. Colour Telev. i. ii. 22 The principle of superposition applies to our perception of colour in terms of both luminance and chromaticity, a principle which is rarely encountered in physiological processes. 1957R. W. G. Hunt Reprod. Colour viii. 79 Subjective terms denote the appearance of the colour to an observer... Objective terms relate to quantities obtained with measuring instruments... Subjective Term: Hue and Saturation. Objective Term: Chromaticity. |