ISSN:0361-2317    

DOI:10.1002/col.5080060102

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

年代:1981

数据来源: WILEY

ISSN:0361-2317    

DOI:10.1002/col.5080060103

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

年代:1981

数据来源: WILEY

摘要:

AbstractManufacturers of colored products in multiplant environments must establish color‐control programs which revolve around physical standards. The preparation of a set of such standards is discussed, and a program to be followed in the preparation and use of such a set is proposed, using a paint system as an exampl

ISSN:0361-2317    

DOI:10.1002/col.5080060104

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

年代:1981

数据来源: WILEY

摘要:

AbstractThe Optical Society of America, in early 1977, published a set of uniformly scaled coor samples based on specifications developed after long years of study by its Committee on Uniform Color Scales. The model for arranging and specifying the samples is based on an octahedral unit which consists of a cluster of 12 colors equally different from a central color and from each of its nearest neighbors. This space lattice, extended to accommodate all samples that can be produced within the gamut of present‐day colorants, is described, together with the adopted system of notation. The lattice provides three sets of square grids and four sets of triangular grids that correspond to the seven pairs of parallel faces of a cuboctahedron. Horizontal, vertical, and oblique cleavage planes through the lattice are described and illustrated. The OSA‐UCS set consists of 558 samples: 424 represent a regular 2‐unit sampling of OSA‐UCS committee space; 134 additional samples are provided in the much used, near‐neutral, central‐lightness region of color space. The set is unique because each sample in the regular set is represented in six different uniform color scales. These appear as linear arrays that pass in six different directions through each sample. The samples are intended for use by artists and designers as well as by scientists. With a relatively small number of samples, material is provided for constructing color scales and charts with colors uniformly spaced in six directions in any chosen part of color space. The OSA‐UCS set provides a “storehouse of color‐contrast information in efficient form.” It provides useful color research material such as has never be

ISSN:0361-2317    

DOI:10.1002/col.5080060105

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

年代:1981

数据来源: WILEY

摘要:

AbstractThe arrangement in space of the sample points of the OSA Uniform Color Scales system is described and related to the cuboctahedron, a geometric figure often used to describe the system. The closest‐packed arrangement, in which each point has 12 nearest neighbors, is emphasize

ISSN:0361-2317    

DOI:10.1002/col.5080060106

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

年代:1981

数据来源: WILEY

ISSN:0361-2317    

DOI:10.1002/col.5080060107

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

年代:1981

数据来源: WILEY

摘要:

AbstractPigment formulations used in producing the 558 samples illustrating the OSA Uniform Color Scales Committee color space are presented. The 15 pigments used, never more than four at a time, are identified and calibration data for computer formulation are given. The information should allow the reproduction of close approximations to the original OSA samples.

ISSN:0361-2317    

DOI:10.1002/col.5080060108

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

年代:1981

数据来源: WILEY

ISSN:0361-2317    

DOI:10.1002/col.5080060109

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

年代:1981

数据来源: WILEY

摘要:

AbstractThe pigmentation plan used for production of the color cards made available by the Optical Society of America (OSA) for its Committee on Uniform Color Scales (UCS) was designed in such a manner that the color scales should, within the production tolerances, appear uniform in all phases of daylight. The production specifications were based onD65of the Commission International de L'Eclairage (CIE) and the CIE supplementary observer (1964) for 10° visual‐field subtense. To test for the intended invariance of uniformity of the scales in daylight, for normal observers, the effects on color differences between all nearest neighbors of the OSA colors have been studied for CIE Illuminant C with the 1931 observer, and for a “daylight” fluorescent luminaire (color temperature 6500 K) with both the 1931 and 1964 CIE observers. Although the colorimetric specifications (Y, x, y) of each color card are different for those three illuminant + observer combinations, the color differences computed with the formula of the OSA‐UCS committee are, within the production tolerances, unchanged. The purpose of this article is to show how well the aim and expectation is fulfilled—that the uniformity of color differences between nearest neighbors in the scales of the OSA‐UCS colors be essentially unchanged for normal observers and for ordinary variations of the quality of natural and artificial daylight. This invariance is found, even for daylight‐quality fluoresc

ISSN:0361-2317    

DOI:10.1002/col.5080060110

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

年代:1981

数据来源: WILEY

ISSN:0361-2317    

DOI:10.1002/col.5080060111

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

年代:1981

数据来源: WILEY