Research Of Infrared Imaging Simulation And Image Enhancement Algorithm

Compared with visible light imaging,infrared imaging has strong anti-interference advantages that are not affected by climate environment and night,and has been widely used in military and civil fields.Therefore,Infrared simulation technology is becoming more and more important.Aiming at building an infrared imaging simulation system,the key issues such as infrared transmission process,infrared image preprocessing and the construction of the simulation system are studied in the thesis.Firstly,this thesis establishes the corresponding infrared transmission link model.The absorption and scattering of the atmosphere and the attenuation effect caused by weather factors are studied,and the atmospheric transmittance is analyzed by using the formula and data.Then the calculation of emissivity of infrared detector are studied,and the detector effect is simulated by Vega's sensor to generate infrared images in different environments.In this thesis,the three-dimensional-noise theory is used to simulate the three-dimensional infrared image.About the problems of image processing and recognition caused by low contrast,fuzzy details and low signal-to-noise ratio of infrared image,this thesis studies the infrared image enhancement algorithm.An infrared enhancement algorithm is proposed based on Retinex decomposition,guided filtering and histogram equalization.After experimental evaluation and verification,the proposed algorithm can effectively enhance the contrast and edge details of infrared images,and realize noise reduction.In order to improve the interactivity and simulation degree of infrared simulation system,this thesis constructs an infrared simulation system on MFC platform based on Vega's API for secondary development.By means of 3D target modeling,texture mapping,viewpoint and path control,the system can simulate a variety of flying targets in different scenes and atmospheric environments,and generate a series of dynamic infrared images.In order to evaluate the fidelity of the simulation image,this thesis evaluate the radiation fidelity of the simulation results by one-dimensional histogram,two-dimensional histogram and comprehensive index.