Patent ID: 7741990
Filing Date: 2010-06-22
Classification: G01S

Abstract:
1. A method for the detection of moving objects by SAR images, comprising the steps of: generating a pulse-repetition frequency signal starting from a radar signal; and generating a sequence of SAR images starting from the pulse-repetition frequency signal; the step of generating a sequence of SAR images comprises generating low azimuth resolution SAR images by means of coherent integration of the pulse-repetition frequency signal for a sub-aperture time shorter than an aperture time; generating difference images through point-to-point difference between subsequent low azimuth resolution SAR images; recognizing patterns associated with moving objects in the difference images; identifying moving-object patterns defined by waveforms comprising a first region, where values of the waveform have a first negative or positive sign, and a second region, where values of the waveform in the second region have a second sign opposite to the first sign, and wherein pre-determined morphological characteristics of the first region and of the second region are the same, except for a pre-determined tolerance; and discriminating moving-object patterns from image components, which are not part of any moving-object pattern, in the difference images.