Red-green and blue-yellow mechanisms are matched in sensitivity for temporal and spatial modulation.
McKeefry, Declan J. Murray, I.J. Kulikowski, J.J.
McKeefry, Declan J.
Murray, I.J.
Kulikowski, J.J.
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2001
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Abstract
The spatial and temporal properties of human colour vision are examined using isoluminant, red¿green and blue¿yellow tritanopic gratings. Chromatic sensitivity is found to be low-pass as a function of both spatial and temporal frequency along all the chromatic axes investigated, including the tritanopic confusion lines employed to examine the properties of the S-cone driven mechanism. Comparison of sensitivity to on-off and contrast reversing stimuli indicates that transient mechanisms contribute to the detection of red¿green patterns but that the detection of S-cone specific patterns is governed by sustained mechanisms. By compensating for transient contributions to red¿green sensitivity, it is shown that sensitivity of chromatic mechanisms dominated by L- and M-cone input are closely matched to those with S-cone input.
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M.Keefry, D.J., Murray, I.J. and Kulikowski, D.J. (2001). Red-green and blue-yellow mechanisms are matched in sensitivity for temporal and spatial modulation. Vision Research. Vol. 41, No. 2, pp. 245-255.
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