Accession Number : AD0888625

Title :   Redundant Area Coding Study.

Descriptive Note : Final technical rept. 5 Nov 70-5 May 71,

Corporate Author : RADIATION MELBOURNE FL

Personal Author(s) : Sillers, William M. ; Gardenhire, Larry W. ; Glover, Ed B.

Report Date : SEP 1971

Pagination or Media Count : 166

Abstract : Redundant Area coding, when used in conjunction with data reduction coding schemes, will reduce by as much as 90 percent the amount of data required to transmit a photograph. Data reductions of this magnitude are particularly needed for use on limited bandwidth wireline links. This technique is primarily applicable where photographic data is being transmitted to a user who is interested in only a small portion of the photo; the remaining areas are required solely for orientation. The areas of interest are transmitted at high resolution while the orienting, or redundant, areas are sent at a low resolution, preserving only the prominent features. Typical uses would be the retransmission of reconnaissance data, weather information, environmental data, and pollution control data. This study presents, in detail, various approaches to redundant area coding together with potential hardware implementation. (Author)

Descriptors :   *CODING), (*INFORMATION THEORY, (*AERIAL PHOTOGRAPHY, REDUCTION), (*PHOTOGRAPHIC IMAGES, DATA TRANSMISSION SYSTEMS), AERIAL RECONNAISSANCE, STATISTICAL ANALYSIS, CURVE FITTING, ELECTROMAGNETIC WAVE FILTERS, DIGITAL SYSTEMS, ERRORS, PROBABILITY, MEMORY DEVICES, NUMERICAL ANALYSIS.

Subject Categories : Cartography and Aerial Photography
      Cybernetics
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE