Simulation And Characterization Of Low-light Optical Remote Sensing

Remote sensing technology is a science that emerged with the development of modern science and is an advanced detection technology.Remote sensing technology plays an important role in climate research,city planning,and resource exploration.Optical remote sensing is one of the most important branches,and it has greatly expanded the scale of human exploration of the Earth.In optical remote sensing,images are the carrier of information,which has the advantages of stability,reliability,and wide range.Low-light remote sensing technology uses low-light detectors to compensate for the limitations of former remote sensing technology.Remote sensing imaging with a low-light detector can greatly extend the time range of remote sensing imaging and can image in dawn,evening or even moonlight conditions.In the design process of spaceborne optical remote sensor,computer simulation technology is used to simulate the imaging process,which can evaluate the feasibility of system imaging and predict the imaging quality of remote sensing satellites from the principle.Because simulation technology plays an important role in the design,manufacture,operation and maintenance of remote sensing satellites,and can help reduce the cost.In order to obtain the simulation image of low-light remote sensing imaging,it is necessary to establish a model of low-light remote sensing imaging.The main research work of this paper includes:1)The mainstream low-light detectors ICCD,EMCCD and sCMOS are described,and the MTF,signal-to-noise ratio,quantization and sampling of the micro-light detector are modeled.2)Based on the MODTRAN atmospheric simulation software,the relationship between the reflectivity of the ground object and the radiance of the enthalpy is established under different illumination and atmospheric conditions.3)Established the MTF model of the full-link imaging full-link,including the MTF corresponding to the atmospheric turbulence,optical system,and remote sensing platform.4)Proposed a mathematical model of linear shifting system based on sparse matrix description,which can make up for the shortcomings of MTF model and more accurately reflect the imaging of remote sensing system.5)Using the MATLAB to write the experimental low-light simulation software module,the SSIM index evaluation simulation similarity is proposed,and the simulation similarity is verified to reach more than 85%.