Abstract
The polarimetric whitening filter (PWF) proposed by Novak et al. is extended to the multilook case to form a multilook PWF (MPWF) fur intensity speckle reduction in multilook polarimetric synthetic aperture radar (SAR) images. The MPWF optimally processes the multilook covariance matrix to generate a minimum-speckle intensity image. The amount of speckle reduction achievable by using the MPWF is quantified. The authors also show that the MPWF is equivalent to a maximum likelihood (ML) filter. Experimental results with the NAS/Jet propulsion laboratory (JPL) airborne L-band, four-look polarimetric SAR data demonstrate the effectiveness of the MPWF.
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