基于等效温度法的海天背景红外场景仿真  

Infrared Scene Simulation of Sea-Sky Background Based on Equivalent Temperature Method

作　　者：陈翾[1,2] 林春生[2] 杨立[2] 

机构地区：[1]中国人民解放军91336部队 [2]海军工程大学

出　　处：《机电工程技术》2015年第8期36-39,173,共5页Mechanical & Electrical Engineering Technology

摘　　要：海天背景作为舰船目标的主要背景,在海战场红外场景仿真研究中占据重要位置。利用实测数据拟合得出的大气发射率关联式计算出不同仰角下的天空背景的辐射亮度。基于Cox-Munk粗糙海面模型,计算出海面的平均发射率、反射率及双向反射率。定义焦平面探测器象元探测到的海域为海面子区域,在子区域划分足够精细前提下,假设一个子区域中仅包含一个小波面,并采用等效温度补偿的方法,计算出小波面的辐射亮度。通过小波面辐射亮度值与图像灰度值间的转换,生成双波段海天背景的红外仿真图像。As the main background, sea-sky background plays an important role in the study of infrared scene simulation of sea battlefield. The sky background radiance at different elevation angle was calculated by using the atmospheric emissivity correlation obtained from measured data fitting. The emissivity, reflectivity and bidirectional reflectance of sea surface were calculated based on Cox-munk rough sea surface model. The sea area observed by pixel of infrared focal plane detector was defined as sea subregion,and it is supposed that one subregion includes only one wavelet plane on the premise of fine region division. The radiance of wavelet planes was calculated by using equivalent temperature compensation method. Dual-band infrared simulated images of sea-sky background were generated by converting wavelet plane radiance value to image gray value.

关 键 词：海天背景 红外场景仿真 等效温度法 辐射亮度 

分 类 号：TN215[电子电信—物理电子学]