Ground moving target indication in SAR images based on local 2-Look similarity

A new algorithm is presented to indicate the ground targets moving in azimuth in synthetic aperture radar (SAR) images. This algorithm is based on local two-Look similarity. In the two looks of the scene, a stationary target has the same positions, but a moving target has different positions. Therefore, moving targets can be indicated by the patch-by-patch similarity detection between the two looks. We use normalized correlation to characterize similarity. In the similarity detection, for each patch in the first look, only the normalized correlations with three patches in the second look are calculated, and thus this algorithm is computationally efficient.