Accession Number:

ADA064800

Title:

Digital Cartographic Study and Benchmark.

Descriptive Note:

Final technical rept. 4 Jun 75-Oct 78,

Corporate Author:

CONTROL DATA CORP MINNEAPOLIS MINN DIGITAL IMAGE SYSTEMS DIV

Personal Author(s):

Report Date:

1978-12-01

Pagination or Media Count:

276.0

Abstract:

A flexible algorithm has been developed to meet the changing requirements for generating terrain data from digital stereo sensor records. The algorithm includes an image matching procedure in which parallax components are determined by automatically correlating conjugate image features. The algorithm is adaptive and can handle various types of sensor and natural terrain conditions. Reliability monitoring of the output terrain data is performed on the basis of the in-process analysis of local image areas. The reliability measure dictates various strategies that the algorithm can apply in image areas where automatic correlation is difficult. The algorithm was implemented on a distributive network of parallel digital processors. In this system, production speed is attained because of the inherent parallelism of the modular processors. Flexibility is maintained because the processors are microprogrammable. In this way, new sensor imaging characteristics and new algorithm strategies can be incorporated without disturbing the fundamental software and hardware structure of the system. Production times for compiling a representative stereo model on this parallel configuration far exceed the capability of general-purpose computers.

Subject Categories:

  • Cartography and Aerial Photography
  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE