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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 10, Iss. 6 — Jun. 1, 1993
  • pp: 1324–1331

Motion at isoluminance: motion dead zones in three-dimensional color space

Davida Y. Teller and Delwin T. Lindsey  »View Author Affiliations


JOSA A, Vol. 10, Issue 6, pp. 1324-1331 (1993)
http://dx.doi.org/10.1364/JOSAA.10.001324


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Abstract

Under some conditions, moving isoluminant stimuli perceptually slow down or even appear to stop. The purpose of the experiment was to explore the shape of the motion dead zone, the region of color space over which the perception of stopped motion occurs. Subjects viewed a small patch of moving grating (2.3 deg × 2.3 deg, 1.3 cycles/degree, 2.9 deg/s), that was spatially modulated in chromaticity, luminance, or both, presented either foveally or at 2-deg eccentricity. The bars of the grating moved from both edges inward toward the center of the patch. Subjects set perceptual motion boundaries by adjusting the contrast of the luminance-modulation component of the grating. Over most or all of the available gamut of chromatic contrasts, the upper and lower boundaries of the motion dead zone formed two parallel planes near the Vλ-isoluminantplane in three-dimensional color space. The data thus suggest that under the conditions of the experiment, perceptual-motion boundaries are determined largely or entirely by the luminance contrast of the stimulus. The data also provide the most extensive evidence available to date for the additivity of motion photometry.

© 1993 Optical Society of America

History
Original Manuscript: August 10, 1992
Revised Manuscript: November 23, 1992
Manuscript Accepted: September 28, 1992
Published: June 1, 1993

Citation
Davida Y. Teller and Delwin T. Lindsey, "Motion at isoluminance: motion dead zones in three-dimensional color space," J. Opt. Soc. Am. A 10, 1324-1331 (1993)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-10-6-1324

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