Title :
Intensity and phase statistics of multilook polarimetric and interferometric SAR imagery
Author :
Lee, Jong-Sen ; Hoppel, Karl W. ; Mango, Stephen A. ; Miller, Allen R.
Author_Institution :
Div. of Remote Sensing, Naval Res. Lab., Washington, DC, USA
fDate :
9/1/1994 12:00:00 AM
Abstract :
Polarimetric and interferometric SAR data are frequently multilook processed for speckle reduction and data compression. The statistical characteristics of multilook data are quite different from those of single-look data. The authors investigate the statistics of their intensity and phase. Probability density function (PDF´s) of the multilook phase difference, magnitude of complex product, and intensity and amplitude ratios between two components of the scattering matrix are derived, and expressed in closed forms. The PDF´s depend on the complex correlation coefficient and the number of looks. Comparisons of these theoretically derived PDF´s are made to measurements from NASA/JPL AIRSAR data. The results of this paper can be applied to feature classification using polarimetric SAR and to the estimation of decorrelation effects of the interferometric SAR
Keywords :
feature extraction; geophysical techniques; geophysics computing; image coding; image recognition; remote sensing by radar; synthetic aperture radar; complex correlation coefficient; data compression; decorrelation effects; feature classification; feature extraction; geophysical measurement technique; image classification; intensity statistics; interferometric SAR imagery; land surface imaging; multilook phase difference; multilook polarimetry; phase statistics; probability density function; radar remote sensing; scattering matrix; signal processing; speckle reduction; synthetic aperture radar; Covariance matrix; Decorrelation; Density functional theory; NASA; Phase measurement; Radar polarimetry; Radar scattering; Sea measurements; Speckle; Statistics;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
