Release from inhibition reveals the visual past
Article Abstract:
Short-term establishment of a subthreshold trace in the brain results from prolonged viewing of a high-contrast repetitive pattern. This trace can prompt a visual illusion of the pattern during rebound from the cross-orientation inhibition caused by viewing moving patterns with an orthogonal orientation. It seems that the stimulation of pattern channels prompts the deposition of a trace lasting for around 30 seconds, possibly at the synaptic level. A rebound from inhibition created by orthogonal orientations brings this trace to perceptual threshold.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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Reflections on colour constancy
Article Abstract:
The colour humans perceive is affected by both the two-dimensional image of an object projected onto the retina and perception of the object's three-dimensional shape, according to research into whether inter-reflections are taken into account by the human visual system when perceiving the colour of surfaces. It appears that the visual system knows even the very subtle aspects of the physics of light. This research supports the view that the colours humans perceive may be determined at a quite late stage of visual processing.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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Visual decomposition of colour through motion extrapolation
Article Abstract:
The visual system is capable of decomposing a yellow stimulus into its constituent green and red components using motion extrapolation. By optically superimposing a flashed red line onto a moving green bar, a yellow stimulus was created. The flashed line appears yellow if the bar is visible for a short period. However, if the trajectory of the moving green bar is visible for a longer period, the line is incorrectly perceived to trail the bar and appears red.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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