Accession Number : ADA211982

Title :   Analysis of Two-Pass Modified Hough Transform Technique for the Detection of Wake Like Signals,

Corporate Author : DEFENCE RESEARCH ESTABLISHMENT PACIFIC VICTORIA (BRITISH COLUMBIA)

Personal Author(s) : Wilmut, M. J. ; MacKinnon, R. F.

Report Date : MAR 1989

Pagination or Media Count : 19

Abstract : In this paper a procedure is developed using the Modified Hough Transform (MHT) for the detection of signals of low signal-to-noise ratio. The signal can be considered as being composed of a sum of narrow lines. The expected number of signal and false lines to be found in an image can be determined as a function of the false alarm probability per decision. The MHT performance is compared to that of the matched filter. The method is applied to noisy images containing a wake-like signal. The MHT is able to detect the signal pattern at signal-to-noise ratios for which the signal is just visible on a good image display system. A two pass system, employing prior knowledge about the signal, gives improved detection performance. Keywords: Speckle noise, Modified hough transform, Matched filter processing, Acoustic detectors, Canada. (jes)

Descriptors :   *ACOUSTIC DETECTORS, *WAKE, CANADA, DETECTION, DISPLAY SYSTEMS, FALSE ALARMS, IMAGE PROCESSING, LOW LEVEL, MATCHED FILTERS, NOISE, PATTERNS, PROBABILITY, PROCESSING, SIGNAL TO NOISE RATIO, SIGNALS, SPECULAR REFLECTION.

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE