Generation of Sample Complex Wishart Distributed Matrices and Change Detection in Polarimetric SAR Data

Allan Aasbjerg Nielsen, Henning Skriver, Knut Conradsen

AbstractThe complex Wishart distribution is used to describe synthetic aperture radar (SAR) data in the so-called covariance matrix representation. We give a test statistic for detection of differences between two instances in this distribution and an associated probability measure. Generated complex Wishart distributed covariance matrices are used to show that this test statistic and the probability measure in situations with no differences follow the expected distributions.
TypeConference paper [With referee]
ConferenceInternational Conference on Digital Image and Signal Processing (DISP)
Year2019    Month April
ISBN / ISSN978-1-912532-05-6
NoteMatlab code in zip file. SAR input images to wishart_change are images of the (row-wise) upper-right elements of the covariance or coherency matrix, e.g. for full polarimetry: a vector with nine real (i.e., non-complex) elements, namely [ShhShh* Re(ShhShv*) Im(ShhShv*) Re(ShhSvv*) Im(ShhSvv*) ShvShv* Re(ShvSvv*) Im(ShvSvv*) SvvSvv*].
Electronic version(s)[pdf] [zip]
Publication link'19.pdf
BibTeX data [bibtex]
IMM Group(s)Image Analysis & Computer Graphics