Research On Laser Three Dimensional Range-gated Super-resolution Imaging

With the development of laser technology,range-gated imaging technology has become a significant research trend at home and abroad,and it has an important application in national defense.The technology uses the laser emitted by the pulsed laser to illuminate the object,and the reflected light is received and processed by the ICCD for imaging.Floating particles,atmospheric turbulence and other factors in the air will affect the laser transmitting and have serious backscatter,the time delay between the laser impulse and ranged-gated impulse can well overcome the shortcomings,and this technology can improve the SNR of the system,image clearly and have higher stability.First of all,this paper introduces the basic principle of range-gated imaging technology,and studies the 3d reconstruction method of range-gated imaging technology,comparesthe depth scanning,gain modulation and super-resolution 3d reconstruction methods and introduces the coding super-resolution 3d reconstruction technology based on energy envelope in the super-resolution reconstruction method in detail.Secondly,in order to solve the problem that image noise affects the accuracy of the distance information of the target object after 3d reconstruction,the types of noise and several filtering methods are analyzed,and a better filtering method is selected for the denoising of the experimental image.Thirdly,the paper introduces the construction of hardware system,and selects the hardware equipment needed for the laser transmitting part,the synchronous control part and the signal receiving part of the system.Finally,in order to verify the feasibility of theories,the distance from gate 3d super resolution reconstruction experiment,through the corresponding algorithm will obtain two-dimensional slice image synthesis could reflect the 3d image of distance information,error analysis of experimental data and results,provide feasible direction in order to further improve the range resolution.