The dynamic analysis of apparent contours

Author

Cipolla, Roberto ; Blake, Andrew

Author_Institution

Dept. of Eng. Sci., Oxford Univ., UK

fYear

1990

fDate

4-7 Dec 1990

Firstpage

616

Lastpage

623

Abstract

The authors develop previous theories of the analysis of deformation of apparent contours under viewer motion. Earlier results showing how surface curvature can be inferred from acceleration of image features are generalized for arbitrary viewer motion and perspective projection. It is shown that relative image acceleration, based on parallax measurements, is robust to uncertainties in robot motion. The theory has been implemented and extensively tested in a real-time (15 frames per second) tracking system based on deformable contours (snakes). It is shown that focusing attention by means of snakes allows rapid, robust computation of surface curvature, including discrimination of extremal and occluding contours

Keywords

computer vision; computerised picture processing; apparent contours; contour deformation analysis; deformable contours; extremal contour; image features; occluding contours; parallax measurements; perspective projection; relative image acceleration; robot motion; snakes; surface curvature; uncertainties; viewer motion; Acceleration; Accelerometers; Focusing; Image motion analysis; Motion analysis; Motion measurement; Real time systems; Robot motion; Robustness; System testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer Vision, 1990. Proceedings, Third International Conference on

Conference_Location

Osaka

Print_ISBN

0-8186-2057-9

Type

conf

DOI

10.1109/ICCV.1990.139606

Filename

139606