Accession Number : ADA131617

Title :   Determining Attitude of Object from Needle Map Using Extended Gaussian Image.

Descriptive Note : Memorandum rept.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE ARTIFICIAL INTELLIGENCE LAB

Personal Author(s) : Ikeuchi,Katsushi

PDF Url : ADA131617

Report Date : Apr 1983

Pagination or Media Count : 28

Abstract : An extended Gaussian image (EGI) is constructed by mapping the surface normals of an object onto the Gaussian sphere. The attitude of an object is greatly constrained by the global distribution of EGI mass over the visible Gaussian hemisphere. Constraints on the viewer direction are derived from the position of the EGI mass center, and from the direction of the EGI inertia axis. The algorithm embodying these constraints and teh EGI mass distribution are implemented using a lookup table. A function for matching an observed EGI with the prototypical EGIs is also proposed. The algorithm determines the attitude of an object successfully both from a synthesized needle map and a real needle map. (Author)

Descriptors :   *Image processing, *Map projection, *Three dimensional, *Spheres, *Computer aided design, Shape, Artificial intelligence, Visual perception, Computations, Pattern making, Pattern recognition, Robotics

Subject Categories : Cartography and Aerial Photography

Distribution Statement : APPROVED FOR PUBLIC RELEASE