Optical Camera/SAR Consistent Imaging Alignment Method Based on SAR Imaging Compensation Under Airborne Co-Aperture System

Taking the advantages of optical camera and synthetic aperture radar (SAR) to perform complementary imaging is a research hot spot in remote sensing image processing, which can be used for target recognition and detection after image registration and fusion. Optical/SAR images acquired by noncommon aperture system have temporal and spatial inconsistencies, there are also significant differences in imaging and radiation mechanism, which make the image-domain alignment process complicated, and the alignment effect and accuracy are also limited. Therefore, this thesis proposes to acquire synchronal optical/SAR heterogeneous data by optics/frequency separation technology under the airborne co-aperture system and puts forward a consistent imaging alignment method based on data domain, which unifies optical photographs and SAR imaging results into the same pixel coordinate system and then establishes the theoretical relationship between the pixel deviation of the two and the position deviation of SAR imaging, finally achieves consistent imaging alignment with higher resolution optical photographs as a reference through the deviation compensation during SAR imaging process. Experimental simulations verified the feasibility of achieving consistent imaging alignment of optical camera/SAR within one pixel in distance and two pixels in azimuth based on SAR imaging compensation, which opens up a new direction for the enhancement of imaging processing efficiency of heterogeneous data and high-precision image processing.