基于Unity3D的改进实时红外仿真系统  

One Improved Real-Time Infrared Simulation System Based on Unity3D

作　　者：张繁[1] 王通 黄可蒙 茅佳明 黎美玲 王章野[3] Zhang Fan;Wang Tong;Huang Kemeng;Mao Jiaxning;Li Meiling;Wang Zhangye(College of Computer Science and Technology;Zhejiang University of Technology,Hangzhou 310023,2Beijing Institute of Spacecraft System Engineering,Beijing 100094,3State Key Laboratory of CAD＆CG Zhejiang University;Hangzhou 310058)

机构地区：[1]浙江工业大学计算机科学与技术学院,杭州310023 [2]北京空间飞行器总体设计部,北京100094 [3]浙江大学紫金港校区CAD&CG国家重点实验室,杭州310058

出　　处：《计算机辅助设计与图形学学报》2018年第7期1177-1186,共10页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家自然科学基金(U1736109;61303141;61772456);国家重点研发计划(2017YFB1002700);国家"八六三"高技术研究发展计划(2015AA016404);浙江省自然科学基金(LY12F02034;LY18F020034)

摘　　要：基于红外物理基础理论和自然场景仿真理论.通过改进已有算法以满足红外仿真系统中的实时性和准确性2个基本要求.提出基于Unity3D的改进实时红外仿真系统.首先探讨并修正了部分零视距离辐射计算模型和影响温度场的主要计算模型,在计算中考虑太阳赤纬角,改进经验公式,提高了计算的准确性;然后在讨论了热源放置和热传递计算问题之后.在红外仿真中考虑物体不同材质特性对红外效果的影响.使得绘制结果更为逼真;最后借助GPU对不同场景对象多角度下的红外辐射灰度进行并行计算.提升计算速度.该系统基于Unity3D游戏引擎.可以构建包含多种目标对象的红外场景,如植被、建筑以及车辆;重建的三维场景仿真效果图与实地拍摄的真实红外场景图像高度相似.仿真实验渲染速度达到30帧/s,基本满足实时性计算要求.Based on infrared physics fundamentals and natural scene simulation theories, we proposed an improved system for infrared scene simulating to fulfill the real-time and accuracy requirements. Firstly, we discussed and improved zero-range-distance infrared radiation and temperature field calculation models. We reformed the empirical formulations by considering the declination of the Sun to improve the accuracy of our computation. Secondly, after we discussed the problems of positioning the heat resource and computing the heat transmission, we incorporated and took account of infrared features of different physical materials to generate high-quality rendering effects. Lastly, we used GPU to accelerate the computation for infrared emission gradation of multiple objects in various scenes. Our system is based on Unity3 D and it can construct many infrared scenes consisting of multiple objects, for instance, plants, buildings and vehicles. The comparisons of our simulation results with the authentic infrared images show the effectiveness of our system. Additionally the rendering speed of 30 frames per second can meet most basic real-time computational requirements.

关 键 词：红外仿真 计算模型 并行加速 红外辐射 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]