00000nam 2200000zi 4500 9.936177 CaOODSP 20241007095055 m o d f cr |n||||||||| 240328e198903uubccad obt f000 0 eng d CaOODSP eng rda CaOODSP n-cn--- DR52-11/5-1989E-PDF Wilmut, M. J. (Michael John), 1943- author. Analysis of a two-pass modified Hough Transform technique for the detection of wake like signals / by M.J. Wilmut and R.F. MacKinnon. Victoria, B.C. : Defence Research Establishment Pacific = Centre de recherches pour la défense pacifique : Research and Development Branch, Department of National Defence, March 1989 1 online resource (ii, 12, [4] pages) : illustrations, charts text txt rdacontent computer c rdamedia online resource cr rdacarrier Technical memorandum ; 89-03 Digitized edition from print [produced by Defence Research and Development Canada]. Includes bibliographical references (page 12). "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."--abstract (page i). Wakes (Fluid dynamics) Detection Mathematical models. Image intensifiers. Sillage (Dynamique des fluides) Détection Modèles mathématiques. Amplificateurs de luminance. Technical reports lcgft Rapports techniques rvmgf Defence Research Establishment Pacific, issuing body. Canada. Department of National Defence. Research and Development Branch, issuing body. Technical memorandum (Defence Research Establishment Pacific) 89-03. (CaOODSP)9.936067 PDF 1.07 MB https://publications.gc.ca/collections/collection_2024/rddc-drdc/DR52-11-5-1989-eng.pdf DREP-TM-89-03