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Simulation of infrared multispectral images

Author: ChenYun
Tutor: TianYan
School: Huazhong University of Science and Technology
Course: Spatial Information Science and Technology
Keywords: IR image simulation Infrared multispectral Vega Temperature field ANSYS Open Flight
CLC: TP391.9
Type: Master's thesis
Year: 2011
Downloads: 97
Quote: 0
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Abstract


Infrared multispectral infrared image simulation of modern science and technology is one of the key technologies, which combines infrared physics, heat transfer, computer graphics and virtual reality and many other technologies, for the infrared multispectral imaging systems and related applications provide a realistic simulation platform. The main research work is familiar with infrared multispectral images through the general process simulation, and specifically for the Vega-based platform to improve infrared simulation. Traditional Vega object temperature infrared simulation method is based on the one-dimensional heat conduction equation, a larger difference with the real physical processes. In this paper, based on Vega and ANSYS simulation of infrared multispectral images equations using three-dimensional thermal conductivity, making infrared simulation results more close to the real situation. This paper proposes two Vega-based platform infrared multispectral image simulation methods, can be different seasons, weather, time of imaging conditions such as different infrared multispectral images. This paper describes the infrared radiation in the atmosphere transmission characteristics, influence of different components on different bands of infrared atmospheric radiative transfer effects and gives the corresponding calculation formula to quantify atmospheric attenuation of infrared radiation, this is done by setting MAT appropriate imaging conditions to calculate atmospheric conditions data. Then discusses the infrared multispectral image simulation to achieve several important aspects of the process, the main use Vega platform infrared multispectral image simulation, which is a convenient tool. This paper introduces the Vega platform, Pro / Engineer for target modeling and MultiGen Creator background modeling process, discusses the general temperature field model and solving methods and how to use ANSYS finite element analysis of temperature field is given infrared multispectral sensor system simulation framework and implementation methods. Finally, this paper describes in detail the two kinds of platform-based Vega infrared multispectral image simulation methods: one is the direct use of visible light image into 8 ~ 12μm its four sub-bands within the infrared image, this method has the characteristics of high efficiency, avoiding the complex three-dimensional modeling work; another one is respectively, through the Pro / Engineer for target modeling and MultiGen Creator background modeling to complete the scene modeling, using ANSYS finite element analysis software on the target temperature field calculation, and then through OpenFlight API format conversion Vega platform into the infrared multispectral image simulation, and finally through comparative experiments shows that the method is closer to the physical process. In the end of this article, the author summarizes the full text of the research work, and made a follow-up to the presence of the key technology issues, pointing out that the next steps.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Computer simulation
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