LED夜视探测及图像质量提升  

LED night vision detection and the improvement of image quality

作　　者：杨婉璐 谌雨章[1] 谭海燕[1] 

机构地区：[1]湖北大学计算机与信息工程学院,湖北武汉430062

出　　处：《信息通信》2015年第8期17-19,共3页Information & Communications

基　　金：湖北省自然科学基金(2014CFB271);湖北省大学生创业创新训练计划项目(201410512031)(201310512038)资助

摘　　要：夜视目标探测现已广泛应用于工业、交通、海洋探测、视频监控等多个领域,采用LED阵列为光源,降低成本的同时,也保证了发光强度。然而,由于夜视成像受大气湍流、吸收和散射等环境的影响以及成像设备的限制,图像质量受到严重的退化影响。因此,针对LED夜视,通过量化LED阵列光束在夜间大气中的传输,及大气湍流和气溶胶对成像的影响,计算得到成像过程的调制传递函数(MTF),以传输退化模型的点扩散函数作为先验知识,结合半盲图像复原法,对目标图像进行处理,提高LED夜视成像的图像质量。并将该方法与传统盲复原方法进行比较,验证了该方法的有效性,图像质量得到了明显改善。The night vision detection has been widely used in many fields, such as industry, transportation, ocean exploration, video monitoring and so on. The light source of LED array helps lower costs, in the meantime ensures the emission intensity. However, due to the influence of atmospheric turbulence, absorption and scattering, and the limitation of imaging equipment, the image quality is severely degraded. Therefore, aim at LED night vision, through the quantization of LED array light beam transmitting in the night air, and the influence of atmospheric turbulence and aerosol, the modulation transfer function （MTF） is calculated. Using the point spread function of the degradation model as a priori knowledge, combined with the semi blind image restoration method, the target image is processed to improve the image quality of LED night vision imaging. Compared with the traditional blind restoration method, the effectiveness of the proposed method is verified, and the image quality is improved obviously.

关 键 词：夜视目标探测 LED MTF 半盲图像复原 

分 类 号：U495[交通运输工程—交通运输规划与管理]