Accession Number : ADA131321

Title :   An Extremum Principle for Shape from Contour.

Descriptive Note : Memorandum rept.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE ARTIFICIAL INTELLIGENCE LAB

Personal Author(s) : Brady,Michael ; Yuille,Alan

PDF Url : ADA131321

Report Date : Jun 1983

Pagination or Media Count : 36

Abstract : An extremum principle is developed that determines three-dimensional surface orientation from a two-dimensional contour. The principle maximizes the ratio of the area to the square of the perimeter, a measure of the compactness or symmetry of the three-dimensional surface. The principle interprets regular figures correctly and it interprets skew symmetries as oriented real symmetries. The maximum likelihood method approximates the principle on irregular figures, but we show that it consistently overestimates the slant of an ellipse. (Author)

Descriptors :   *Computer graphics, *Artificial intelligence, *Image processing, *Image registration, *Pattern recognition, Three dimensional, Surfaces, Contours, Symmetry, Orientation(Direction), Geometric forms, Curves(Geometry), Projective geometry, Mathematical models, Computer aided design, Vision

Subject Categories : Bionics

Distribution Statement : APPROVED FOR PUBLIC RELEASE