June 2017
Volume 17, Issue 7
Open Access
OSA Fall Vision Meeting Abstract  |   June 2017
Does spatially homogeneous color stimulation produce a single response point within the physiological cone excitation space?
Journal of Vision June 2017, Vol.17, 44. doi:10.1167/17.7.44
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      Shahram Peyvandi, Alan Gilchrist; Does spatially homogeneous color stimulation produce a single response point within the physiological cone excitation space?. Journal of Vision 2017;17(7):44. doi: 10.1167/17.7.44.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

The Poisson fluctuation in absorbed photons occurring when a photoreceptor is exposed to monochromatic light (Geisler, 1989) does not give us, for an array of identical receptors exposed to uniform multi-wavelength light, the proportion of receptors at each specific level of absorbed energy. Here we derived it. The resulting distribution of responses within the CIE 1931 chromaticity space resembles MacAdam's (1942) magnified scatterings for the variability of color matches. As our approach applies to any array of photosensitive elements, living or non-living, we found that it predicts well the spatial variation of pixel values when a sub-array of a CMOS sensor is exposed to a uniformly illuminated color patch. This implies that variations in reflectivity of individual cones observed in microscopic images of human retina (Roorda & Williams, 1999; Pallikaris, Williams, & Hofer, 2003) used to infer cone absorptance may partly be due to the nature of light as it interacts with identical interleaved receptors.

Meeting abstract presented at the 2016 OSA Fall Vision Meeting

Geisler, W. 1989. Sequential ideal-observer analysis of visual discrimination Psychol. Rev. 96(2): 267–314 [CrossRef] [PubMed]
MacAdam, D. L. 1942. Visual sensitivities to color differences in daylight J. Opt. Soc. Am. 32(5): 247–274 [CrossRef]
Pallikaris, A., Williams, D. R., Hofer, H. 2003. The reflectance of single cones in the living human eye Invest. Ophthalmol. Vis. Sci. 44(10): 4580–4592 [CrossRef] [PubMed]
Roorda, A., Williams, D. R. 1999. The arrangement of the three cone classes in the living human eye Nature 397520–522 [CrossRef] [PubMed]
Footnotes
 We greatly acknowledge James Tornes and Manjunath Somayaji from ON Semiconductor for providing us with the imaging module. We acknowledge NSF funding (BCS-1230793).
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