3D image scaling of spinning target via wideband and narrowband radar networking

A novel method for three-dimensional (3D) image scaling of spinning target is proposed via wideband and narrowband radar images registration. It gets the scaling factor by extracting the difference of two images, which are obtained via two distributed radar in space. The size and angle of a distorted 3D image obtained via wideband radar, is interrelated with that of a distorted two-dimensional (2D) image obtained via narrowband radar, which is determined by the difference in the line of sights (LOS). Through registering the 3D image and the 2D image, the size and angle parameters related with the scaling factor can be obtained. And then the scaling factor is able to be calculated by solving a system of equations. Compared with the available scaling method, the proposed method is simpler to estimate the scaling factor with image registration parameters. In addition, this method can make the most of the existing radar equipments without rigid requirement in time synchronization and phase synchronization.