# Qualitative Depth and Shape from Stereo, in Agreement with Psychophysical Evidendence

 dc.date.accessioned 2004-10-04T14:36:59Z dc.date.accessioned 2018-11-24T10:11:42Z dc.date.available 2004-10-04T14:36:59Z dc.date.available 2018-11-24T10:11:42Z dc.date.issued 1987-12-01 en_US dc.identifier.uri http://hdl.handle.net/1721.1/6053 dc.identifier.uri http://repository.aust.edu.ng/xmlui/handle/1721.1/6053 dc.description.abstract Obtaining exact depth from binocular disparities is hard if camera calibration is needed. We will show that qualitative depth information can be obtained from stereo disparities with almost no computations and with no prior knowledge (or computation) of camera parameters. We derive two expressions that order all matched points in the images in two distinct depth-consistent ways from image coordinates only. One is a tilt-related order $\\lambda$, the other is a depth-related order $\\chi$. Using $\\lambda$ demonstrates some anomalies and unusual characteristics that have been observed in psychophysical experiments. The same approach is applied to qualitatively estimate changes in the curvature of a contour on the surface of an object, with either $x$- or $y$-coordinate fixed. en_US dc.format.extent 20 p. en_US dc.format.extent 1353851 bytes dc.format.extent 1040681 bytes dc.language.iso en_US dc.subject stereo vision en_US dc.subject qualitative depth en_US dc.subject induced-effect en_US dc.subject motion en_US dc.title Qualitative Depth and Shape from Stereo, in Agreement with Psychophysical Evidendence en_US
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