Spatial And Temporal Aspects Of Red/Green Opponency

D H Kelly

doi:10.1117/12.944725

24 June 1988 Spatial And Temporal Aspects Of Red/Green Opponency

D H Kelly

Proceedings Volume 0901, Image Processing, Analysis, Measurement, and Quality; (1988) https://doi.org/10.1117/12.944725
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States

Abstract

Like other aspects of color vision, interactions between the visual pathways of the long-wave-sensitive (LWS) and the middle-wave-sensitive (MWS) photoreceptors can no longer be regarded only as functions of wavelength. The results of color matching, detection, discrimination and cancellation procedures may also vary with spatial and/or temporal properties of the stimulus. In some ways, the spatial and temporal stimulus dimensions have analogous effects on color perception. For example, the (opponent-color) responses to isoluminant, red/green, sine-wave stimuli are low-pass in both spatial and temporal frequency domains, whereas the (luminous) responses to monochromatic or achromatic stimuli emphasize higher frequencies in both domains. But spatial patterns can have properties that temporal waveforms cannot, involving orientation or symmetry.Thus the simplest model for spatial phase relations--a linear filter with zero phase-shift--is forbidden in the temporal case. This paper emphasizes the properties of 3-way (spatiotemporal-chromatic) interactions, and discusses the role of separability in modelling these interactions.

Citation Download Citation

D H Kelly "Spatial And Temporal Aspects Of Red/Green Opponency", Proc. SPIE 0901, Image Processing, Analysis, Measurement, and Quality, (24 June 1988); https://doi.org/10.1117/12.944725

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