@ARTICLE\{IMM2003-01219,
    author       = "K. Conradsen and A. A. Nielsen and J. Schou and H. Skriver",
    title        = "A test statistic in the complex Wishart distribution and its application to change detection in polarimetric {SAR} data",
    year         = "2003",
    month        = "jan",
    keywords     = "covariance matrix test data, {EMISAR,} radar applications, radar polarimetry, remote sensing change detection.",
    pages        = "4-19",
    journal      = "{IEEE} Transactions on Geoscience and Remote Sensing",
    volume       = "41",
    editor       = "",
    number       = "1",
    publisher    = "",
    note         = "Typos: 1) eq (5) and just below eq (6): w should be x; 2) just before eq (24) vs just below eq (66): when p refers to the dimension of the covariance matrix, the p's are added, when p refers to the number of degrees of freedom, their squares are added; 3) eq (52): m/n should be n/m; immediately above eq (52): Y/X should be (Y/m)/(X/n).",
    url          = "http://ieeexplore.ieee.org/Xplore/RecentIssue.jsp?Punumber=36",
    abstract     = "When working with multilook fully polarimetric synthetic aperture radar (SAR) data, an appropriate way of representing the backscattered signal consists of the so-called covariance matrix. For each pixel, this is a 3x3 Hermitian positive definite matrix that follows a complex Wishart distribution. Based on this distribution, a test statistic for equality of two such matrices and an associated asymptotic probability for obtaining a smaller value of the test statistic are derived and applied successfully to change detection in polarimetric {SAR} data. In a case study, {EMISAR} {L-}band data from April 17, 1998 and May 20, 1998 covering agricultural fields near Foulum, Denmark are used. Multilook full covariance matrix data, azimuthal symmetric data, covariance matrix diagonal-only data, and horizontal–horizontal (HH), vertical–vertical (VV), or horizontal–vertical (HV) data alone can be used. If applied to {HH,} {VV,} or {HV} data alone, the derived test statistic reduces to the well-known gamma likelihood-ratio test statistic. The derived test statistic and the associated significance value can be applied as a line or edge detector in fully polarimetric {SAR} data also.",
    isbn_issn    = "DOI:10.1109/TGRS.2002.808066"
}