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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 49, Iss. 12 — Dec. 1, 1959
  • pp: 1143–1145

Small-Field Chromaticity Discrimination

DAVID L. MACADAM  »View Author Affiliations


JOSA, Vol. 49, Issue 12, pp. 1143-1145 (1959)
http://dx.doi.org/10.1364/JOSA.49.001143


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Abstract

The evaluation of the noticeability of chromaticity differences between very small areas is needed in studies of color graininess. In the present work, color-discrimination data for eleven well-selected chromaticities were determined by a single observer using a matching method for fields subtending (a) 3′ and (b) 4.4°. The data for the large field agree fairly well with those previously published. The comparable results for the 3′ field have been summarized for convenience in the form of a plane uniform chromaticity diagram in which the standard CIE coordinate network is curvilinear. The diagram represents a simplified approximation to the actual results, which would require a curved surface for accurate representation. Nevertheless, the present diagram is suitable for evaluating the large chromaticity differences that areencountered in color graininess and in most other applications of small-field color-discrimination data.

© 1959 Optical Society of America

Citation
DAVID L. MACADAM, "Small-Field Chromaticity Discrimination," J. Opt. Soc. Am. 49, 1143-1145 (1959)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-49-12-1143

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