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The paper introduces a new likelihood ratio test (LRT) for incoherent detection of man-made objects obscured by foliage in forest area. The test is performed to detect changes between a reference image and a surveillance image. The method is developed for change detection in high resolution Synthetic Aperture Radar (SAR). For simplicity and lack of more appropriate models, the new LRT is still based...
The paper introduces an incoherent change detection algorithm with constant false alarm rate (CFAR). The algorithm is based on a CFAR detector that preceded with an adaptive noise smoothing filter while the input of the filter is preliminary changes retrieved from a subtraction of surveillance SAR image to reference SAR image. The algorithm is tested with 24 data sets provided by CARABAS. The average...
The paper introduces a new likelihood ratio test for incoherent wavelength-resolution SAR change detection where the assumption of bivariate zero-mean circular Gaussian processes for noise and clutter is replaced by bivariate Rayleigh processes. This replacement brings a higher average probability of detection and/or lower false alarm rate. Hence, the experimental result shows that an average probability...
Frequency estimation has a great importance for protection services, power quality, and in the operation of an electric power system. This paper describes and analyzes six methods used in frequency estimation. The techniques were tested by employing signals generated from mathematical equations, with and without noise and harmonics. Aiming to analyze the algorithms behavior in applications that involve...
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