Accession Number:

ADA045624

Title:

Scene Content Analysis Program - Phase II.

Descriptive Note:

Final rept. 7 Jul 76-15 Jul 77,

Corporate Author:

UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF ELECTRICAL ENGINEERING

Report Date:

1977-07-15

Pagination or Media Count:

278.0

Abstract:

This report summarizes the development of map matching techniques for precision guided reentry vehicles using measurements extracted from data taken by sensors with different operating characteristics and under different viewing geometries. The case of matching optical to side looking radar images is considered in detail. Map matching with hierarchical search was developed and practical algorithms implemented in matching scences with a wide variety of contents. Theoretical analyses, which were subsequently verified by experiment, indicated that applications of this method have made the difficult task of optical to radar map matching possible at a computational efficiency of 3 orders in magnitude higher than current map matching methods. Map matching with this method has also resulted in a high probability of a match at a relatively low probability of false fix. Also included are analyses to determine perpective, scaling and rotational parameters from data extracted from image set. Geometric transformation for the correction of viewing geometry can be made using these parameters. Intensity transformation using sensor-dependent parameters was also developed. Practical algorithms were implemented for the corrections of the intensity of several sets of radar images.

Subject Categories:

  • Cartography and Aerial Photography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE