摘要
为了降低细分采样累加方式对线列推扫成像清晰度的影响,利用孔径函数的变换,提出了相应的反降晰方法,实现了同一个位置上的像元累加,使得推扫方向上的孔径函数和线列方向等同,消除了累加过程中像元位移的影响。在细分采样累加倍数为4的情况下,Nyquist频率处的传递函数值提高7%。通过对反降晰算法的仿真采样验证,结果表明本算法完全可以达到预定要求,算法简单,只需少量加法器,在目前的成像仪电路中稍微修改可编程芯片即可投入工程应用。
In order to eliminate the impact of oversample-cumulating method on clarity of linear push-broom imaging, with the transition of aperture function, a deblurring method was put forward to cumulate the pixel in the same sample position, thus the aperture function in push-broom direction was equal to the linear direction, and the impact of pixel shift in cumulating was eliminated. With the sample-cumulating rates of 4, at Nyquist frequency the value of pixel transfer function was increased by 7%. Through simulating oversample-cumulating test, the results show that the deblurring algorithm can be achieved. This simple algorithm only needs a small number of adders, with slightly modified FPGA codes, then the camera can be put to use.
出处
《量子电子学报》
CAS
CSCD
北大核心
2008年第5期610-614,共5页
Chinese Journal of Quantum Electronics
基金
福建省青年科技人才创新项目(2007F3066)
华侨大学高层次人才科研启动金资助项目(05BS302)
关键词
遥感
反降晰
孔径函数
线列推扫
remote sensing
deblurring
aperture function
linear push-broom
作者简介
张滢清（1979-），博士，华侨大学讲师，主要从事红外成像技术的研究。E-mail：yqzhangcn@163．com
