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- W281864644 abstract "Abstract : The term LOFAR is defined as 'search technique using omnidirectional sonobuoys'. It is an acronym for Low Frequency Analysis and Recording. When the signal to noise ratio is low, the detection of a track in a lofargram by computer is difficult. Actually, operators often face this kind of problem when detecting an acoustic signature in the noisy sea environment. Furthermore, operators must keep on tracking lofargram to identify a given target. This problem could be handled by the automation of lofargram processing using filtering or image processing techniques. This technique will suppress the background and emphasize the spectral lines in the lofargram. Targets can be tracked by an automatic lofargram processing system up to a certain point at which the system should alarm the operator. The enhancement processing of lofargrams using a relaxation method could be one part of the automatic system of lofargram processing to provide available target information for good decisions. The objective of this thesis is to enhance spectral lines of the lofargram by using the relaxation method which is an iterative approach to line detections." @default.
- W281864644 created "2016-06-24" @default.
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- W281864644 date "1990-06-01" @default.
- W281864644 modified "2023-09-26" @default.
- W281864644 title "Relaxation Method Applied to LOFARGRAM" @default.
- W281864644 hasPublicationYear "1990" @default.
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