21 December 1994 Comparison of estimators for correlation properties of K-distributed SAR images
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Abstract
This paper extends previous analysis of the errors in the optimum determination of the properties of K-distributed clutter to include the spatial correlation properties. Throughout this analysis of the texture properties of SAR clutter we compare operating in the domain of intensity with using its log or square root. Initially we derive the variance of the correlation coefficients in the three domains and demonstrate the advantage of both the log and amplitude domains over the intensity. In addition we show that a normalized estimator yields a further reduction in the variance. Finally, the results are combined in a derivation of the errors in the correlation length obtained by fitting the correlation coefficients to an assumed exponential autocorrelation function.
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Pierfrancesco Lombardo, Pierfrancesco Lombardo, Christopher John Oliver, Christopher John Oliver, } "Comparison of estimators for correlation properties of K-distributed SAR images", Proc. SPIE 2316, SAR Data Processing for Remote Sensing, (21 December 1994); doi: 10.1117/12.197548; https://doi.org/10.1117/12.197548
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