Research On Super-resolution Three-dimensional Imaging Based On Synthetic Aperture Of Image Sequence

The use of image sequences for 3D reconstruction of targets has important value in the direction of target reconnaissance,recognition,navigation and mapping.Synthetic aperture imaging principles are robust,reliable,and have high spatial resolution.Based on the principle of optical non-coherent synthetic aperture imaging,this thesis performs super-resolution three-dimensional reconstruction of visible light and laser image sequences respectively.The main contents are as follows:(1)Improved the synthetic aperture super-resolution imaging method for visible light image sequences.A super-resolution reconstruction method based on Keren registration and BTV regularization is proposed to optimize the super-resolution reconstruction process of synthetic aperture image.This method can preserve sub-pixel information in image sequence and has strong robustness.By using the sum of the difference between the gray value of the image and the average gray value instead of image information entropy,using square root of the product of the sum of squared differences instead of the joint information entropy of the image,the synthetic aperture correlation and phase are proposed.The focus/defocus evaluation function of the volume of information is improved in calculation speed compared with the similar method.(2)Experimental simulation of the synthetic aperture super-resolution monocular and binocular vision target three-dimensional depth acquisition method.Aiming at the problem that the monocular synthetic aperture imaging method cannot suppress the common mode error and the defocus image interference,the binocular synthetic aperture imaging method is proposed.The monocular visual imaging method has better imaging effects than the methods based on other similar evaluation criteria.Compared with monocular vision imaging,binocular vision imaging method can better suppress common mode error and defocus image interference,and has good stability and robustness.(3)A hyperspace resolution 3D reconstruction method for a common laser illumination source is proposed.Aiming at the low spatial resolution of 3D non-scanning lidar,the laser echo intensity information obtained by 2D sensor and the target depth information obtained by 3D lidar are combined based on synthetic aperture imaging principle to realize beyond the 2D sensor and 3D lidar.Three-dimensional imaging of spatial resolution.Experimental results show that the proposed method can improve the spatial resolution without changing the 3D lidar structure.