| 摘要 |
A method (100) for coherent change subtraction of mission and reference synthetic aperture radar (SAR) data (20',20'') is provided. The method (100) forms (102) mission and reference images (22',22'') from the mission and reference SAR data (20',20''), registers (122) the mission and reference images (22',22'') on a common plane to form registered mission and reference images (24',24''), and forms (124) the registered mission and reference images (24',24'') into at least one patch (26) containing mission and reference data (28',28''). The method (100) then processes (126) each patch (26) by removing (130) linear phase terms (34) from the mission data (28'), trimming (142) non-overlapping spectra of the mission and reference data (28',28''), and balancing (144) phases and amplitudes of the mission data (28'). The method (100) then concatenates (160) the patches (26) to produce processed mission and reference images (52',52''), and subtracts (162) the processed mission and reference images (52',52'') to form a delta image (54). The method (100) then postprocesses (164,170) the delta image (54) for specific applications.
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