摘要
针对目前一些红外焦平面阵列(IRFPA)成像系统动态范围较小的问题,分析比较了国内外在系统动态范围扩展方面的研究及其优缺点,介绍了通过自适应调节系统积分时间的工作方式来调整动态范围的方法。包括3个方面的内容:采用对获得图像进行特征判断的方法获取调整依据;结合LMS自适应滤波技术给出了调整算法;由于积分时间的变化会对系统非均匀性产生影响,结合两点校正法提出了一种简单可行的非均匀性问题的解决方案。最后,对整体方案进行了实验验证,通过实验证明了自适应动态范围调整方法的可行性,并获得了较好的效果,成像质量有明显提高。
According to the fact that the dynamic range of infrared focal plane arrays （IRFPA） imaging systems are not enough in width, the researches on widening the dynamic range in China and aboard and their merits and faults were analyzed and compared. The method that the dynamic range of imaging system was adjusted by adaptive regulating the integration time was introduced. In the implementation process of the method, the three contents were as follows： obtaining the adjust witness through feature judgement of the image; achieving the adjust algorithm through the LMS adaptive filter technology; and a simple non-uniformity method based on the two-points method is put forward, as integration time influenced the imaging quality. At last, the total scheme was validated experimentally. The experiment proves that the method of the dynamic range adaptive adjustment is feasible, and the imaging quality is improved evidently.
出处
《红外与激光工程》
EI
CSCD
北大核心
2008年第2期265-269,共5页
Infrared and Laser Engineering
基金
国防预研基金项目(2004AA5073)
关键词
红外焦平面器件
动态范围
自适应滤波
积分时间
Infrared focal plane arrays
Dynamic range
Adaptive filter
Integration time
