论文部分内容阅读
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。
Aiming at the small dynamic range of some infrared focal plane array (IRFPA) imaging systems, the research on the dynamic range expansion of the system at home and abroad is analyzed and compared, and their advantages and disadvantages are analyzed. By introducing the method of adaptively adjusting the integral time of the system Method of adjusting the dynamic range. Including the following three aspects: adopting the method of obtaining the feature of the image to get the adjustment basis; combining with the LMS adaptive filtering technology to give the adjustment algorithm; as the integration time changes will have an impact on the system non-uniformity, combined with two-point correction Method proposed a simple and feasible solution to the problem of non-uniformity. Finally, the whole scheme is verified by experiments. The feasibility of adaptive dynamic range adjustment method is proved by experiments, and good results are obtained. The imaging quality is obviously improved.