AN EXPERIMENTAL STUDY OF TWO METHODS OF INDEXING TACTICAL IMAGERY
Abstract
An experiment conducted to compare two methods--graphic and textual-- of indexing reference materials for use of image interpreters in a tactical image interpretation facility is reported. The objective was to evaluate the two methods for speed and accuracy in locating rolls of reference imagery in a TIIF. Image interpreters trained in the use of area-oriented graphic and textual indexes to tactical imagery on roll film were required in two experiments to obtain from indexes the accession number of rolls of imagery containing coverage for a given area. Interpreter performance with both types of indexes was compared for accuracy and speed. Major findings were: (1) Interpreters took less time on the average with the textual index when areas were small; (2) with the graphic index, less time was taken when areas were large. The longer time taken with the textual index to locate desired imagery for large areas appeared due to recording and analyses tasks required under these conditions. Conclusions point to the greater utility of the graphic index in a manual image processing system where coverage of large geographical areas is required or if image coverage has to be precisely defined. The textual index appears more useful in a computerized system where coverage of small area targets with less definition is the major requirement.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1966
- Accession Number
- AD0643243
Entities
People
- Richard S. Laymon
Organizations
- System Development Corporation