Abstract:
:In the context of the models of structure from motion visual processing, we propose that the optic-flow field is a source of information for the perception of the curvature of a smooth surface in motion. In particular, it is shown how the spin variation (SV), a second spatial derivative of the retinal velocity field, is mathematically related to the curvature of the surface. Under the hypothesis that the visual system relies on SV to analyse the structure of a moving surface, a neural scheme for SV detection is proposed and psychophysical predictions are developed. Results obtained on artificial images show that the SV scheme presents a rather weak sensitivity to noise in conditions of low image velocity.
journal_name
Biol Cybernjournal_title
Biological cyberneticsauthors
Droulez J,Cornilleau-Pérès Vdoi
10.1007/BF00198096subject
Has Abstractpub_date
1990-01-01 00:00:00pages
211-24issue
3eissn
0340-1200issn
1432-0770journal_volume
62pub_type
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