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Spatial scale in stereo and shape-from-shading: Image input, mechanisms, and tasks

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons84072

Mallot,  HA
Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Zitation

Mallot, H.(1996). Spatial scale in stereo and shape-from-shading: Image input, mechanisms, and tasks (39).


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0013-EB24-E
Zusammenfassung
The problem of spatial scale in depth perception can be considered on three stages: image input, mechanisms, and depth descriptors specific for certain tasks. This paper reviews a number of earlier experiments supporting the distinction between a coarse, correlation-based mechanism and a matching mechanism of stereopsis in terms of their respective inputs and outputs. In order to measure the influence of the correlation mechanism on the perception of three-dimensional shape, a shape-probe experiment was designed. The results show that for smooth intensity-profiles, perceived shape is largely independent of stereoscopic cues but does make use of shape-from-shading as well as the assumption that brighter parts are in front (proximity-luminance covariance).