Pooling of vertical disparities by the human visual system

Adams, Wendy, Frisby, John P., Buckley, David, Gårding, Jonas, Hippisley-Cox, Stephen D. and Porrill, John (1996) Pooling of vertical disparities by the human visual system Perception, 25, (2), pp. 165-176.


Full text not available from this repository.


Two experiments are described in which the effects of scaling vertical disparities on the perceived amplitudes of dome-shaped surfaces depicted with horizontal disparities were examined. The Mayhew and Longuet-Higgins's theory and the regional-disparity-correction theory of Garding et al predict that scaling should generate a change in perceived depth appropriate to the viewing distance simulated by the scaled vertical disparities. Significant depth changes were observed, by means of a nulling task in which the vertical-disparity-scaling effect was cancelled by the observer choosing a pattern of horizontal disparities that made the dome-shaped surface appear flat. The sizes of the scaling effects were less than those predicted by either theory, suggesting that other cues to fixation distance such as oculomotor information played an appreciable role. In conditions in which 50% of the texture elements were given one value of vertical-disparity scaling and the remaining 50% were left unscaled, the size of the scaling effect on perceived depth could be accounted for by equally weighted pooling of the vertical-disparity information unless the two scalings were very dissimilar, in which case the lower scaling factor tended to dominate. These findings are discussed in terms of a Hough parameter estimation model of the vertical-disparity-pooling process.

Item Type: Article
Related URLs:
ePrint ID: 18646
Date :
Date Event
Date Deposited: 29 Nov 2005
Last Modified: 16 Apr 2017 23:10
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/18646

Actions (login required)

View Item View Item