High-accuracy infrared simulation model based on establishing the linear relationship between the outputs of different infrared imaging systems

Accurately simulating the output of an infrared imaging system is increasingly important for predicting the operational performance of the system under different conditions. Traditional infrared simulation models need to obtain the actual temperature of the simulated scene, which is quite complex and will introduce various error sources. To solve this problem and improve the accuracy of the simulation results, a novel infrared simulation model is proposed by studying the linear relationship between the outputs of different infrared imaging systems in this paper. This work is accomplished mainly by conducting variables separation and linear approximation on the signal transfer function of infrared imaging system and converting geometric resolution between the outputs of different infrared imaging systems. To verify the simulation model, the output of the mid-wave/long-wave thermal imager is simulated by the proposed model based on the measured output of the long-wave/mid-wave thermal imager, and the simulated results are compared with the measured results. Experimental results show that the simulated results have high accuracy.