Accession Number : AD0422946

Title :   THE PRENORMALIZATION OF RECONNAISSANCE DATA.

Descriptive Note : Final rept. 25 May 62-25 June 63,

Corporate Author : PHILCO CORP BLUE BELL PA

Personal Author(s) : Bogusz,John F. ; Kellett,H. G. ; Bryan,J. S.

Report Date : 25 JUL 1963

Pagination or Media Count : 1

Abstract : Several techniques are described and evaluated for the prenormalization of gray-scale aerial photographs prior to their use as input to an adaptive memory recognition system. It summarizes the evidence for analagous preprocessing operations in the animal visual system. Discussed are the mplementation and testing of several pre-processing techniques which reduce the gray-scale input data to binary form. The utility of candidate techniques in connection with automatic detection of targets on aerial photographs is estimated by comparing recognition error rates on a computersimulated adaptive memory recognition system. Problems associated with high-speed prenormalizing techniques were investigated through the construction of a real time gradient mapping system which also permits evaluation of certain parameter variations on various types of target images. A preferred implementation is described for a versatile prenormalization device, suitable for use in various recognition tasks. (Author)

Descriptors :   (*TARGET RECOGNITION, AERIAL RECONNAISSANCE), (*IDENTIFICATION, AERIAL TARGETS), (*AERIAL PHOTOGRAPHS, PROCESSING), IMAGES, DETECTION, COMPUTER LOGIC, DATA PROCESSING, DIGITAL SYSTEMS, REAL TIME, MAPPING, ERRORS, TABLES(DATA)

Distribution Statement : APPROVED FOR PUBLIC RELEASE