一种Blinn-Phong BRDF红外反射模型的研究  

A Blinn-Phong BRDF infrared reflection model

作　　者：李敏 杨壹斌 王亚楠 杨敏 

机构地区：[1]火箭军工程大学,陕西西安710025

出　　处：《计算机工程与科学》2018年第1期101-107,共7页Computer Engineering & Science

基　　金：国家自然科学基金(61102170);国家社会科学基金(15GJ003-243)

摘　　要：针对红外场景仿真中辐射反射分量运算复杂、真实感欠缺等问题,提出一种Blinn-Phong BRDF红外反射模型,并基于Unity平台将其应用于三维红外仿真场景。该方法在对实测红外图像进行阈值分割的基础上,利用简化辐亮度运算和红外成像过程的仿真链路反演模型,求解目标表面温度值,根据红外辐射原理与可见光光照模型的理论相似性,将改进的Blinn-Phong光照模型移植到红外波段,并引入双向反射分布函数提高仿真精度,提出Blinn-Phong BRDF红外反射模型;最后基于该辐射反射模型构建零视距仿真场景,同时将仿真图像与实测图像进行比对,验证了反射模型的可信度和有效性。实验结果表明,提出的红外反射模型既有较高的仿真效率,又能够较好地模拟红外反射的高光现象,满足红外视景仿真对辐射反射的要求。Aiming at problems of the complicated calculation of radiation reflection components and realistic deficiency in the infrared scene simulation,we present a Blinn-Phong BRDF infrared reflection model,which can be used in 3 Dinfrared scene simulation based on Unity.Based on the threshold segmentation of measured infrared images,the target surface temperature is solved by using the simulation link inversion model,which includes simplification of radiance operation and infrared imaging process.According to the similarity between the infrared radiation theory and visible light illumination model,the modified Blinn-Phong model is transplanted into the infrared band,and the bidirectional reflectance distribution function(BRDF)is introduced to improve simulation accuracy.The Blinn-Phong BRDF infrared reflection model is presented.Finally,zero stadia simulation scenes are built based on this radiation reflection model,and simulated images and measured images are compared to verify the reliability and effectiveness of the reflection model.Experimental results indicate that the reflection model has high simulation efficiency,and can better simulate the high light phenomenon of infrared reflection,meeting the requirement of radiation reflection in the infrared scene simulation.

关 键 词：红外反射模型 成像链路 双向反射分布函数 场景仿真 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]