摘要:

AbstractFor its 50th anniversary year, the history of the formation and early years of the Inter‐Society Color Council is reporte

ISSN:0361-2317    

DOI:10.1002/col.5080070102

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1982

数据来源: WILEY

摘要:

AbstractThe system of colorimetry defined by the CIE in 1931 was the culmination of the pioneering determinations of the colour‐mixture curves by Maxwell, König, and Abney in the 19th century. American workers then made major contributions in the form of the 1922 Colorimetry Report of the Optical Society of America and the data adopted by the CIE in 1924 as the standard Vλ curve. The colour‐matching data for the 1931 CIE standard observer were provided by Guild and the author in England, but it was a race against time to get the form of the system agreed in time for its adoption at the 1931 meeting of th

ISSN:0361-2317    

DOI:10.1002/col.5080070103

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1982

数据来源: WILEY

摘要:

AbstractColor science is a unique and stimulating blend of many scientific disciplines. Physicists, physiologists, psychologists, psychophysicists, mathematicians, and chemists have all contributed to our understanding of how we see color. Tools and techniques have been developed to help those who work with color in their everyday lives, whether it be in manufacturing, in design, in communication, or in any other field. Some tools, such as the CIE Standard Observer, were derived from empirical color‐matching data but can now be explained, at least approximately, on the basis of our knowledge of the physiology of the visual system. Others, such as most color‐difference formulae, are still purely empirical and explanations in terms of the actual functioning of the human visual system are largely unknown. It is likely that improved tools and techniques will come in the future as we increase our knowledge of the visual system and how it works. Such increased knowledge will come most readily if there is more cooperation between the various disciplines and less tendency to think along narrow discipline‐limited

ISSN:0361-2317    

DOI:10.1002/col.5080070104

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1982

数据来源: WILEY

摘要:

AbstractUnit ovals in the CIE chromaticity diagram are used to compare and evaluate new developments in color‐difference formulas since the 1976 CIE recommendation

ISSN:0361-2317    

DOI:10.1002/col.5080070105

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1982

数据来源: WILEY

摘要:

AbstractAn intercomparison of the absolute reflectance scales of NBS, Washington, D.C. (USA), NRC, Ottawa (Canada), and PTB, Braunschweig (FRG) was organized by sending two samples of Russian opal glass MS‐20 to the three laboratories. An additional exchange of a Halon sample between NBS and NRC was arranged. The results of this intercomparison are presented. They show that the three different geometries used at the three laboratories yield values which agree to within ±0.

ISSN:0361-2317    

DOI:10.1002/col.5080070106

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1982

数据来源: WILEY

摘要:

AbstractColor differences resulting from pigment concentration errors in several four‐pigment formulas were determined by computer. The color differences varied linearly with the percent change in pigment concentration. Applications of this type of calculation are discusse

ISSN:0361-2317    

DOI:10.1002/col.5080070107

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1982

数据来源: WILEY

ISSN:0361-2317    

DOI:10.1002/col.5080070108

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1982

数据来源: WILEY

ISSN:0361-2317    

DOI:10.1002/col.5080070109

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1982

数据来源: WILEY

摘要:

AbstractExponents to be used in a nonlinear model for chromatic adaptation by Nayatani, Takahama, and Sobagaki are discussed and determined as functions of the effective adapting levels by considering several experimental facts of color perception related to a change of adapting illuminance. The analyzed data refer to the color‐appearance attribute “colorfulness” studied by Hunt, the color appearance of a high‐reflectance sample studied by Hunt, the brightness studied by Stevens, and the chromatic adaptation effect between daylight and tungsten light studied by Breneman. By using the derived functions of the exponents it is shown that the model predicts quite well the following perceptual effects: (1) the chromatic adaptation effect between standard Illuminants D65and A, (2) the dependence of effect (1) on the adapting luminance, (3) the increase of colorfulness of colored samples (the first Hunt effect), (4) the increase of blueness of high‐reflectance samples (the second Hunt effect), (5) the increase of bright and dark contrast of nonselective samples (the Stevens effect), and (6) the color perception of nonselective samples under a colored adapting illumination (the Helson effect). Effects (3)–(5) are observed by increasing the adaptin

ISSN:0361-2317    

DOI:10.1002/col.5080070110

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1982

数据来源: WILEY

摘要:

AbstractThe factors affecting the differences in appearance between colours in original scenes and in their pictures are reviewed. These include the picture's border, its angular magnification, its luminance, the colour of its illuminant, its surround, and the extent to which it is itself perceived as an object. Different criteria of picture evaluation are needed according to the circumstances.

ISSN:0361-2317    

DOI:10.1002/col.5080070111

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1982

数据来源: WILEY