摘要
采用Mote-Carlo方法构造了二维随机粗糙海面.利用海面双向反射分布函数(BRDF)模型计算了海面在紫外和可见光波段的辐射亮度,并与大气传输软件Modtran计算结果进行了对比分析.基于目标表面材料BRDF模型,计算分析了海上某舰船目标分别在紫外和可见光波段对背景辐射的散射亮度,并与海面背景辐射亮度进行了对比.结果表明,在紫外和可见光波段,海面背景辐射对舰船目标亮度的影响可以忽略,探测时间和方位、舰船表面材料、目标形状以及探测波段等因素,共同决定了舰船目标的散射特性,为实现海面舰船目标的多波段实时探测与识别提供一定的参考依据.
The Mote-Carlo method is used to construct a two-dimensional random rough sea surface.The radiance of the sea surface is calculated in the ultraviolet and visible light bands by using the sea surface bidirectional reflectance distribution function(BRDF)model,and compared with the calculation results of atmospheric transmission software Modtran.Based on the target surface material BRDF model,the scattering luminances of ultraviolet and visible light bands of a ship target are calculated and analyzed separately,and compared with the background radiance of the sea surface.The results show that the effect of sea surface radiation on the ship target luminance can be ignored in the ultraviolet and visible light bands,the scattering characteristics of ship targets are affected by the detection time and orientation,ship surface material,target shape,detection band and other factors,which provides some references for real-time detection and identification of the ship target by using multi-band.
作者
牛武斌
李奎
杨玉峰
NIU Wubin;LI Kui;YANG Yufeng(College of Physics and Electronic Engineering,Shanxi University,Taiyuan 030006,China;School of Physics and Optoelectronic Engineering,Xidian University,Xi’an 710071,China;School of Automation and Information Engineering,Xi’an University of Technology,Xi’an 710048,China)
出处
《河南科学》
2019年第3期349-355,共7页
Henan Science
基金
国家自然科学基金青年基金(61405157)
关键词
双向反射分布函数(BRDF)
紫外和可见光
舰船目标
海面散射
bidirectional reflectance distribution function(BRDF)
ultraviolet and visible light
ship targets
sea surface scattering
