Accession Number : AD0714576

Title :   Pattern Recognition Device with Adaptive Preprocessing and Classification.

Descriptive Note : Final technical rept. Nov 67-Aug 69,

Corporate Author : BENDIX CORP SOUTHFIELD MICH BENDIX RESEARCH LABS

Personal Author(s) : Idelsohn,J. M.

Report Date : SEP 1970

Pagination or Media Count : 72

Abstract : A program to investigate the application of bionics techniques to the solution of aerial photography pattern recognition problems has been completed. The investigation included development of a unique circuit which will have application in pattern recognition and trainable system. Called an adaptive filter, this circuit is a band-pass filter which can be trained to adjust its center frequency in accordance with externally generated training signals. A bank of these filters was incorporated in the preprocessing stage of a breadboard pattern recognition system, and served to extract frequency information from an input video signal. Performance of this system was evaluated for the problem of terrain recognition from single-frame panchromatic aerial photography. The photography was converted to a suitable time-varying video signal by a flying-spot scanner. A training strategy enabled the system to refine its processing operations in order to improve classification performance with time. Successful performance of the system was demonstrated in a series of classification tests involving over 1900 terrain samples. Recognition accuracies ranged from 64.5 percent to 95 percent.

Descriptors :   (*AERIAL PHOTOGRAPHY, *PATTERN RECOGNITION), (*ARTIFICIAL INTELLIGENCE, VISUAL PERCEPTION), BAND PASS FILTERS, ADAPTIVE SYSTEMS, STOCHASTIC PROCESSES, PHOTOGRAPHIC ANALYSIS, PHOTOGRAPHIC INTELLIGENCE, TERRAIN, INPUT OUTPUT DEVICES, DATA PROCESSING, TOPOLOGY, CYBERNETICS, LEARNING MACHINES

Subject Categories : Cartography and Aerial Photography
      Computer Hardware
      Bionics

Distribution Statement : APPROVED FOR PUBLIC RELEASE