Infrared Thermal Imaging System Performance Evaluation

In recent years, the applications of Infrared Imaging System (IRIS) has been widely used. Now it has been applied in various fields of the national economy instead of the initially purpose of military. In order to effectively shorten development cycle and reduce the design cost, IRIS performance model has been constantly put forward. Many years ago, people abroad had tried to use IRIS computer-aided design, in the domestic some people engaged in researching in this field, which was later than abroad and lag in technology.The papers establish the IRIS performance evaluation model based on Visual C++ platform. In the model, we calculate MTF of this system and demonstrate its curve simulation, we also could realize system MRTD by subjective identification of the human eye, calculate the atmospheric transmittance of infrared radiation banded in 3～5um and 8～12um, the visibility range estimation of the IRIS and the 3D noise's extraction of the infrared video images. We add customization mode in the calculation of MTF. In the estimate of MRTD, firstly we simulate aspect ratio of 7:1 for the four-bar as a target background pattern, secondly do Fourier Transform into frequency domain, thirdly do_Modulation Filter with the system transform function on graph of frequency domain, lastly do the Inverse Fourier Transform on graph of frequency domain and display on the screen. Finally, we use our eyes to determine whether the blurred four bar will be identify.This performance model has the features of ease of operation, flexible and easy-to-use. Finally, we compared other's experimental data to verify the model's reliability and accuracy.