With the advantage of fast imaging speed, video synthetic aperture radar (ViSAR) is able to monitor small targets in key areas continuously. W-band is relatively high band to realize video imaging, the Bragg scattering characteristics also create conditions for the imaging and detection of shadows for power lines. This paper reports the video imaging results of a small UAV-borne W-band SAR on power lines and analyzes the relationship to incident angles.
In this paper, a novel method of heterologous image registration method based on feature inertial following is proposed, which can perform high-precision and rapid registration of SAR image and optical image. The first image pair in the sequence is registered based on improved SURF feature to achieve high-precision registration. Based on this registration result, the other image pairs in the sequence are registered by the method of feature inertia following to achieve rapid registration. The proposed method makes full use of the correlation and gradient properties between image sequence frames. It maintains the registration accuracy of the preceding images, improves the registration speed greatly.
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