Accession Number : ADA334845

Title :   Image Invariants Research

Descriptive Note : Final technical rept. 1 Jan 94-30 Sep 97

Corporate Author : LOCKHEED MARTIN MISSILES AND SPACE CO SUNNYVALE CA

Personal Author(s) : Barrett, Eamon ; Payton, Paul M.

PDF Url : ADA334845

Report Date : 23 DEC 1997

Pagination or Media Count : 13

Abstract : A uniform algebraic procedure is presented for deriving both epipolar geometry and three-dimensional object structure from general stereo imagery. The procedure assumes central-projection cameras of unknown interior and exterior orientations. The ability to determine corresponding points in the stereo images is assumed, but no prior knowledge of the scene is required. Epipolar geometry and the fundamental matrix are derived by algebraic elimination of the object-variables from the imaging equations. This provides a transfer identified in the new perspective. Next, invariant coordinates for the scene-points are derived by algebraic elimination of the camera parameters from the imaging equations. Identical coordinates are obtained from any stereo images of non-occluding scene points as long as the same set of 5 corresponding points can be identified in both stereo pairs. The procedure extends methods utilizing the cross-rations of determinants and cyclopean vectors, presented in earlier work. A technique for reconstructing the 3-dimensional object from the invariant coordinates is also given.

Descriptors :   *IMAGE PROCESSING, DATA BASES, ALGORITHMS, SYNTHETIC APERTURE RADAR, RADAR IMAGES, PATTERN RECOGNITION, PHOTOGRAPHIC IMAGES, STEREOSCOPIC DISPLAY SYSTEMS, STEREOPHOTOGRAPHY.

Subject Categories : Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE