Likelihood Ratio Test Polarimetric SAR Ship Detection Application
DEFENCE RESEARCH AND DEVELOPMENT CANADA OTTAWA (ONTARIO)
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This technical memorandum describes the algorithms, features and implementation of the Likelihood Ratio Test LRT Polarimetric SAR PolSAR Ship Detection Application. The detection algorithm is based on the likelihood ratio test with Neyman-Pearson criterion. The detection algorithm is applicable to many PolSAR system configurations, including quad polarimetric, dual polarimetric and single-channel. The detection threshold is calculated from image statistics to achieve a desired false alarm probability. Other statistical quantities are also calculated, such as covariance and correlation of polarimetric channels, as well as mean and standard deviation of the decision variable. A Pauli decomposition algorithm is included as an initial step for a future target classification capability. Examples of typical results are given. The report contains a user guide and design diagrams for the algorithm implementation. The detection algorithms were developed for C-band airborne PolSAR data from the EC CV-580, C- band polarimetric SAR sensor flown on the EC CV-580 but are also applicable to ENVISAT ASAR and RADARSAT-1-2 images.
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