Hyperspectral Data Processing: Algorithm Design and Analysis

27.3 Variable-Number Variable-Band Selection

The pair of and defined in (27.8) associated with the lth band signature s_l is considered as two correlated prioritization scores of the lth band, which are essentially two pieces of information contained in two orthogonal subspaces, and P_r. Due to the principle of orthogonality (Poor, 1994), the information in generally provides innovations information about the signature vector s with respect to reference signature vector r. Therefore, only the in (27.8) is used to rank the bands in Ω according to descending order of its magnitude. The ranked band set resulting from using priority can be further broken up into two disjoint sets, and , determined ...