Robust subaperture stitching method based on three-dimensional surface data matching

Abstract

In the interferometric subaperture stitching, the subaperture-overlapped regions are often inaccurately positioned due to positioning error. To achieve better stitching effect, we propose a robust subaperture stitching method based on three-dimensional surface data matching. Speeded up robust features algorithm is used to calculate the relative displacements of adjacent subapertures, and subsequent pose adjusting is performed according to the displacements. The method needs neither auxiliary measures nor a known initial displacement value, which can eliminate the dependence on the precision of the mechanical device of the subaperture stitching. Experiments show that the proposed method can obtain smooth, mosaic-free surface results without dislocation.