摘要
针对多TDI-CCD拼接相机存在成像非均匀性问题,开展了对拼接相机输出图像的片内及片间综合校正算法研究。结合CCD相机特性介绍了TDI-CCD的工作原理以及拼接相机成像非均匀性的产生机理。然后,分别对拼接相机片内及片间非均匀性校正的原理进行分析,提出了片内采用两点法校正,片间采用比值平均综合法校正。最后,对片内及片间综合非均匀性校正的参数标定及校正方法进行了探讨。实验结果表明,对存在8.4%非均匀性的原拼接输出图像,采用片内与片间综合校正法校正后,图像非均匀性达到了2.7%,表明该校正方法可基本满足TDI-CCD拼接相机对成像非均性校正的要求,其算法有效实用。
Aiming at the imaging non-uniformity problem of a muhi-TDI-CCD mosaic camera, the synthetical correction algorithms about the single TDI-CCD and multi TDI-CCD are studied. Based on CCD camera characteristics, the principles of TDI-CCD and non-uniformity generation are introduced. Then the working principles of the single and multi TDI-CCD are analyzed, respectively. The two-point correction method is applied to the single TDI-CCD and the ratio average correction method is applied to the multi TDI-CCD . Finally, the synthetical correction method is discussed. Experimental results indicate that the imaging non-uniformity of the multi-TDI-CCD mosaic camera corrected by proposed method has reached 2.7 % for a original image with non-uniformity of 84 %, which proves that this correction method satisfies the requirements of the target of the muhi-TDI-CCD camera, and the algorithm has good practicality and efficiency.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2009年第12期3084-3088,共5页
Optics and Precision Engineering
基金
长春市科技攻关资助项目(No.07163UC080)
