基于BRDF的空中目标红外成像建模与仿真
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摘要
提出了一种空中目标的红外成像仿真方法.根据能量守恒定律,利用目标在天空背景中稳态时的热平衡方程,求解表面温度场;选取适合的双向反射分布函数模型描述目标表面面元在红外波段的反射特性,提高面元红外反射的真实感.综合考虑空中目标的几何模型,目标自身红外辐射和对背景的反射辐射,结合计算机图形学相关理论,渲染输出空中目标的红外图像.成像仿真的方法为空中目标的探测、识别和跟踪提供了参考依据.
An infrared imaging simulation method for aerial targets is proposed. According to the lawof energy conservation,the surface temperature field is solved by using the thermal equilibrium equation of the target in the sky background. The suitable bidirectional reflection distribution function model is selected to describe the reflection characteristics of the target surface element in the infrared band,which improves the realism of the infrared reflection of face element. Taking into account the geometric model of air target,the infrared radiation of target itself and the reflected radiation to background render the infrared image of aerial target in combination with the relevant theories of computer graphics. The modeling and simulation methods provide a reference for the detection,identification and tracking of aerial targets.
An infrared imaging simulation method for aerial targets is proposed. According to the lawof energy conservation,the surface temperature field is solved by using the thermal equilibrium equation of the target in the sky background. The suitable bidirectional reflection distribution function model is selected to describe the reflection characteristics of the target surface element in the infrared band,which improves the realism of the infrared reflection of face element. Taking into account the geometric model of air target,the infrared radiation of target itself and the reflected radiation to background render the infrared image of aerial target in combination with the relevant theories of computer graphics. The modeling and simulation methods provide a reference for the detection,identification and tracking of aerial targets.
引文
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[6]WANG Hong-Yuan,CHEN Yun. Modeling and simulation of space target infrared dynamic radiation characteristics[J]. Infrared and Laser Engineering(汪洪源,陈赟.天基空间目标红外动态辐射特性建模与仿真.红外与激光工程),2016,45(5):0504002-1-0504002-7.
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[9]LI Hui-ping. Modeling and simulation of dynamic infrared target and background[D]. Beijing:Graduate University of Chinese Academy of Sciences(李惠萍.动态红外目标、背景的建模与仿真)2008.
[2]ZOU Tao,TONG Zhong-Xiang,WANG Chao-Zhe,et al.Research on infrared image simulation of air targets based on tactic fusion[J]. Laser&Infrared(邹涛,童中翔,王超哲,等.基于战技融合的空中目标红外图像仿真研究.激光与红外),2016,46(4):444-451.
[3]WANG Biao,TONG Zhong-Xiang,WANG Chao-Zhe,et al. Simulation of imaging for Airplane[J]. Laser&Infrared(王彪,童中翔,王超哲,等.飞机的红外图像仿真.激光与红外),2015,45(8):911-917.
[4]RUAN Ri-Quan. Research on the simulation of infrared multi-bands for the aerial target scene[D]. Xian:Xidian University(软日权.空中目标场景红外多波段仿真研究)2013.
[5]ZHANG Wei,WANG Hong-Yuan,WANG Zhi-Le,et al.Research on modeling method of visible light scattering characteristics of space objects[J]. Acta Photonica Sinica(张伟,汪洪源,王治乐,等.空间目标可见光散射特性建模方法研究.光子学报),2008,37(12):2462-2467.
[6]WANG Hong-Yuan,CHEN Yun. Modeling and simulation of space target infrared dynamic radiation characteristics[J]. Infrared and Laser Engineering(汪洪源,陈赟.天基空间目标红外动态辐射特性建模与仿真.红外与激光工程),2016,45(5):0504002-1-0504002-7.
[7]Nicodemus F E. Reflectance,nomenclature and directional reflectance and emissivity[J]. Applied Optics,1970,9(6):1474-5.
[8]Cook R L,Lucasfilm Ltd,. Torrance K E. A reflectance model for computer graphics[J]. ACM Transaction on Graphics,1982,1(1):7-24.
[9]LI Hui-ping. Modeling and simulation of dynamic infrared target and background[D]. Beijing:Graduate University of Chinese Academy of Sciences(李惠萍.动态红外目标、背景的建模与仿真)2008.