摘要
光电成像系统的抽样过程引起图像频谱分布在频谱空间无限重复，即使抽样过程满足系统的Ｎｙｑｕｉｓｔ条件，即无频谱混叠，但在重建过程中，如果电子滤波的频率响应范围较宽，不能对高阶频谱项截止，它对高阶重复的频谱项的衰减所产生的残余频谱会在重建图像中产生假响应。本文提出用同一图像进行多重交织抽样的方法来消除重建过程中的高阶残余频谱，同时具有较好图像恢复的效果。在理论上用光学传递函数方法证明了有关的结论。
In an optoelectric imaging system, the sampling procedure produces an infinite of replica of image spatial frequency distribution in spatial frequency domain. Even though no alaising is resulted from sampling, high order replica residual can be yielded during image reconstruction when an electric filler with a wide cutoff frequency is used. In this paper, we propose the multiple interlacing sampling to eliminate high order replica residual while maintaining image reconstruction. The involved theoretical description in view of optical transfer function is also given.
出处
《光学技术》
EI
CAS
CSCD
1998年第2期77-81,共5页
Optical Technique
基金
国家自然科学基金
关键词
光电成像系统
交织抽样
高阶残余频谱
假响应
optoelectric imaging system, optical transfer function, interlacing sampling, image reconstruction, high order replica residual, spurious response.
