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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)

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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

DAVID L. MACADAM, "Small-Field Chromaticity Discrimination," J. Opt. Soc. Am. 49, 1143-1145 (1959)

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  1. K. F. Stultz and D. A. Koch, J. Opt. Soc. Am. 46, 832 (1956).
  2. D. B. Judd, J. Opt. Soc. Am. 25, 24 (1935).
  3. G. N. Rautian and V. I. Demkina, Proc. Acad. Sci. U.S.S.R. 66, 859 (1949).
  4. D. L. MacAdam, J. Opt. Soc. Am. 40, 589 (1950).
  5. W. R. J. Brown and D. L. MacAdam, J. Opt. Soc. Am. 39, 808 (1949).
  6. D. L. MacAdam, J. Opt. Soc. Am. 32, 2 (1942).
  7. L. Silberstein, J. Opt. Soc. Am. 33, 1 (1943).
  8. D. L. MacAdam, J. Franklin Inst. 238, 195 (1944).
  9. D. L. MacAdam, J. Opt. Soc. Am. 33, 18 (1943).
  10. G. W. Ingle and L. Rudick, J. Opt. Soc. Am. 43, 501 (1953).
  11. H. R. Davidson and J. J. Hanlon, J. Opt. Soc. Am. 45, 617 (1955).

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