高温环境下航空摄像机图像降噪研究及实现  

Study on Image Denoising of Aero Camera under High Temperature and Its Implementation

作　　者：田立坤[1,2] 刘晓宏[2] 李洁[2] 郭晓光[2] 

机构地区：[1]光电控制技术重点实验室 [2]中国航空工业洛阳电光设备研究所,洛阳471009

出　　处：《科学技术与工程》2013年第19期5529-5535,共7页Science Technology and Engineering

基　　金：航空科学基金(20105113002)资助

摘　　要：根据环境适应性和可靠性的要求,高分辨率CMOS航空摄像机系统要求工作在高温环境中。高温环境下CMOS航空摄像机系统采集的图像存在多种噪声。根据噪声特性和产生原理,提出了将阈值中值滤波算法和离散高斯滤波算法结合进行图像降噪处理。最后采用自顶而下模块划分的方法进行详细的逻辑电路设计。实验结果表明在FPGA平台上设计的硬件电路能够快速、高效地对混合算法进行实现,资源消耗少,满足实时性要求。混合算法能够取得较好的降噪效果,摄像机的可靠性和抗干扰能力得到提高。According to the requirement of environment adaptability and reliability, the high-resolution CMOS aero camera system will work under high temperature, which are adulterated with a variety of noise. In terms of the noise characteristics and generate principle, to combine threshold median filtering algorithm and Gaussian filtering algorithm are proposed to reduce image noise. Finally, detailed logic circuit was designed with module division from top to down. The experimental results show that the circuit designed on the FPGA platform can achieve combined algorithm quickly and efficiently with less consumption of resources and satisfies the requirement of real time. The combined algorithm can achieve better denoising effect. And the anti-jamming capability and reliability of camera are improved.

关 键 词：CMOS 降噪 FPGA 高温 

分 类 号：TP317.4[自动化与计算机技术—计算机软件与理论]