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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 52, Iss. 4 — Apr. 1, 1962
  • pp: 460–468

Width of the Human Visual Spread Function as Determined Psychometrically

ROBERT N. WOLFE  »View Author Affiliations


JOSA, Vol. 52, Issue 4, pp. 460-468 (1962)
http://dx.doi.org/10.1364/JOSA.52.000460


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Abstract

The response of the human visual system to an optical image is assumed to be linearly related to the logarithm of the spread function of the photographic system projected onto the retina combined with the spread function of the visual system. From psychophysical data derived from viewing (at different distances) a series of pictures generated with different spread functions, an estimate is obtained of the variance of the spread function of the visual system. The square root of this variance ranges from 3µ to 8µ, depending on the techniques used and on the training of the judges. Although the residual errors in this determination are small, they show systematic trends, indicating that definition depends on other factors than the composite variance.

Citation
ROBERT N. WOLFE, "Width of the Human Visual Spread Function as Determined Psychometrically," J. Opt. Soc. Am. 52, 460-468 (1962)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-52-4-460


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References

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  2. The term "sharpness" was used for this concept by them, but that term has since been reserved for a description of the appearance of a single edge.
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