ANALYSIS OF A TWO-PASS MODIFIED HOUGH TRANSFORM TECHNIQUE FOR THE DETECTION OF WAKE LIKE SIGNALS

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Authors
  1. Wilmut, M.J.
  2. Mackinnon, R.F.
Corporate Authors
Defence Research Establishment Pacific, Victoria BC (CAN)
Abstract
Various authors have employed versions of the Hough Transform for the detection of lines in images containing multiplicative speckle noise. 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.
Report Number
DREP-TM-89-03 — Technical Memorandum
Date of publication
15 Mar 1989
Number of Pages
21
DSTKIM No
89-03162
CANDIS No
61063
Format(s):
Hardcopy;Originator's fiche received by DSIS;Document Image stored on Optical Disk

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