On spatiochromatic visual sensitivity and peripheral color LOD management

ABSTRACT

Empirical findings from a gaze-contingent color degradation study report the effects of artificial reduction of the human visual system's sensitivity to peripheral chromaticity on visual search performance. To our knowledge, this is the first such investigation of peripheral color reduction. For unimpeded performance, results suggest that, unlike spatiotemporal content, peripheral chromaticity cannot be reduced within the central 20° visual angle. Somewhat analogous to dark adaptation, reduction of peripheral color tends to simulate scotopic viewing conditions. This holds significant implications for chromatic Level Of Detail management. Specifically, while peripheral spatiotemporal detail can be attenuated without affecting visual search, often dramatically (e.g., spatial detail can be so reduced up to 50% at about 5°), peripheral chromatic reduction is likely to be noticed much sooner. Therefore, color LOD reduction (e.g., via compression), should be maintained isotropically across the central 20° visual field.

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INDEX TERMS

Primary Classification:
  I. Computing Methodologies
  I.3 COMPUTER GRAPHICS
      I.3.3 Picture/Image Generation
          Subjects: Display algorithms

Additional Classification:
  I. Computing Methodologies
  I.3 COMPUTER GRAPHICS
      I.3.6 Methodology and Techniques
          Subjects: Ergonomics

  J. Computer Applications
  J.4 SOCIAL AND BEHAVIORAL SCIENCES
      Subjects: Psychology

Keywords:
Gaze-contingent displays