基于辐射源的非均匀性校正算法的研究与实现  

Research and Implementation of Non-uniformity Correction Algorithm Based on Radiation Source

作　　者：谭文 宋鸿飞[1] 张科航 曹文晓[1] 郭飞 TAN Wen;SONG Hongfei;ZHANG Kehang;CAO Wenxiao;GUO Fei(School of Opto-Electronic Engineering,Changchun University of Science and Technology,Changchun 130022)

机构地区：[1]长春理工大学光电工程学院,长春130022

出　　处：《长春理工大学学报（自然科学版）》2023年第3期93-99,共7页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：吉林省科技厅发展计划项目(20200401066GX)。

摘　　要：红外辐射测量系统的成像性能以及测量精度受到焦平面阵列非均匀性的严重影响,原始红外图像需要通过非均匀性校正提高图像质量。为了进一步提高探测器输出图像非均匀性校正(NUC)的效果以及实时性,对基于标准辐射源的非均匀性校正算法进行研究,并且在可重构单元FPGA中实现。为了验证算法实现的效果,采用以VOX LWIR FPA探测器为核心的红外成像系统以及低温面源黑体M345X-LC进行实验结果验证。实验结果表明:在FPGA之中实现的非均匀性校正算法,采集的图像NUC前非均匀性为13%,通过NUC算法之后,红外图像的非均匀性降到了0.94%。在可重构单元FPGA上实现的非均匀性校正算法整体上降低了图像的非均匀性,同时提高了图像NUC的实时性。The imaging performance and measurement accuracy of infrared radiation measurement system are seriously affected by the non-uniformity of focal plane array.The original infrared image needs to be improved by non-uniformity correction.In order to further improve the non-uniformity correction(NUC)effect and real-time performance of detector output image,this paper studies the non-uniformity calibration algorithm based on standard radiation source and implements it in reconfigurable unit FPGA.In order to verify the implementation effect of the algorithm,an infrared imaging system with VOX LWIR FPA detector as the core and low-temperature point source blackbody M345X-LC were used to verify the experimental results.The experimental results show that the non-uniformity correction algorithm implemented in FPGA is 13%before NUC acquisition.After NUC algorithm is adopted,the non-uniformity of infrared image is reduced to 0.94%.The non-uniformity correction algorithm implemented on FPGA reduces the non-uniformity of image and improves the real-time performance of image NUC.

关 键 词：可重构 红外焦平面 非均匀性 FPGA 

分 类 号：TP33[自动化与计算机技术—计算机系统结构]