Research On Measurement Matrix Construction Technology In Infrared Image Reconstruction

Infrared imaging guidance technology has many advantages,such as good concealment,strong anti-interference ability and high precision guidance,so it is not only an important development direction in the field of precision guidance,but also expected to be the leader of precision guidance for this century.Therefore,in recent years,the research on the direction of infrared imaging has been in full swing.This paper summarizes and analyses the research results of related directions in recent years,introduces the compressed sensing sampling theorem to deal with the phenomenon of low imaging quality in infrared imaging systems,and reconstructs high-precision infrared images with a small amount of sampled data by compression imaging technology.The main contents of this paper are as follows:In the process of compression imaging,the original image is first compressed and sampled by measuring matrix,so that a small amount of sampled data can be obtained,and then the image is reconstructed by the signal recovery algorithm from a small amount of sampled data.In the study of measurement matrix,three construction methods of deterministic measurement matrices are proposed in this paper:(1)Inspired by the rosette scanning trajectory,a rosette deterministic measurement matrix is constructed.A deterministic sequence is constructed by equidistantly obtaining a certain number of sampling points on the rosette trajectory.By making a certain design sorting operation on the deterministic sequence,it becomes a measurement matrix suitable for restoring infrared images;(2)A deterministic diagonal measurement matrix is constructed based on the respective characteristics of Toplitz matrix and Kronecker product.The measurement matrix is designed by using the repeatability of Toplitz,which is simple in structure,easy to apply to the actual physical platform,and has a good recovery effect on infrared images;(3)A deterministic measurement matrix is constructed based on the idea of Archimedes spiral trajectory.A deterministic sequence is constructed by uniformly collecting a series of sampling points on the Archimedes spiral.The deterministic sequence takes a certain construction sorting operation,making it a measurement matrix suitable for infrared image reconstruction.In addition,based on the Archimedes spiral measurement matrix and by analyzing the imaging characteristics of rotating platform,a deterministic measurement matrix based on the rotating platform is studied.The construction method of this measurement matrix is different from the traditional digital micromirror array and mask methods.The construction method is based on the rotation motion of the optical device itself,which requires a low cost and is easy to implement in a hardware platform.Moreover,it can reconstruct high-resolution infrared image under the condition of rotation operation,and contribute more clear and reliable information for further target identification,detection and tracking tasks.