Research On Inversion And Simulation Technology Of Infrared Data Of Camouflage Target

With the rapid development of infrared imaging technology in the ground weapons and equipment’s recognition,infrared imaging guidance,and precise strikes,in order to improve the survival probability of military targets in the battlefield environment,it is necessary to analyze the infrared characteristics of the camouflage target and then simulate the infrared data at the enemy’s high altitude for evaluating the effectiveness of camouflage measures.Therefore,this paper researches the extraction and analysis of invariant features and local discrepancy of camouflage targets,simulation,and calculation of the radiation transmission in the mid-infrared and thermal infrared region.Besides,we propose an equivalent algorithm to simulate airborne/spaceborne imaging based on low-altitude infrared data.Finally,the multi-band,multiphase camouflage target airborne/spaceborne simulation images are generated.The specific work is as follows:We first studied the identifiable features of camouflaged targets on different detection platforms and extracted them using measured data.Then we analyzed the changes in infrared features of camouflaged targets on UAV platforms and airship platforms,which concluded the significant or consistent discrepancy in infrared features of camouflaged targets between different platformsAccording to the radiation characteristics of the camouflage target and the reconnaissance threat it faces,the atmospheric radiation transmission equation of the camouflage target in the infrared band was deduced,and the method to calculate the parameters of the equation using MODTRAN was given.Because of the insufficient research on adjacency effects in the midinfrared region,this paper analyzed the main factors affecting adjacency effects in the infrared detection process and quantified its magnitude.Above all,a new mid-infrared radiation transmission model is proposed,which is highly precise.In this study,an equivalent algorithm for simulating high-altitude images based on lowaltitude infrared data was designed.The equivalent atmospheric transmission model was established,which includes radiation parameter simulation and adjacency effect simulation.And it was combined with the spatial resolution of the infrared sensor.By this means,the fulllink simulation from low-altitude data to high-altitude equivalent detection image was realized.The simulation synthesized images under different detection times and different wavebands.Finally,we used the global evaluation index and local features to evaluate the effect of the simulated image,which verifies the effectiveness of the model.This paper studied the important process of the camouflage target detection and imaging at high-altitude and then established a mid-infrared radiation transmission analytical model including the adjacency effect simulation,which has important significance for the retrieval of surface temperature.The infrared data simulation method,aiming at the camouflage target,helps verify the detection and recognition algorithm and evaluate the camouflage effectiveness.