## 留言板

 引用本文: 赵剡, 李东兴, 许东等 . 抑制复原图像振铃波纹的频域循环边界算法[J]. 北京航空航天大学学报, 2006, 32(11): 1290-1294.
ZhaoYan, Li Dongxing, Xu Donget al. Circulation edge algorithm in frequency domain to suppress the ringing ripples on the restored image[J]. Journal of Beijing University of Aeronautics and Astronautics, 2006, 32(11): 1290-1294. (in Chinese)
 Citation: ZhaoYan, Li Dongxing, Xu Donget al. Circulation edge algorithm in frequency domain to suppress the ringing ripples on the restored image[J]. Journal of Beijing University of Aeronautics and Astronautics, 2006, 32(11): 1290-1294. (in Chinese)

## 抑制复原图像振铃波纹的频域循环边界算法

• 中图分类号: TP 391

## Circulation edge algorithm in frequency domain to suppress the ringing ripples on the restored image

• 摘要: 提出了一种基于Wiener滤波的频域循环边界复原算法,并给出了有效的规整化表达式和信噪比估算方法.复原算法首先将原观测图像按反射对称的方式延拓,形成一个新的观测图像(称为延拓图像);然后,用Wiener滤波算法复原延拓图像,并取延拓图像的复原图像的主值序列作为原观测图像的复原图像.对延拓图像在频域进行复原处理时,需要使用FFT(Fast Fourier Transform)技术,将延拓图像进行周期延拓,因其结合边界在垂直方向上的梯度为零,且边界平滑满足微分条件,抑制了复原图像的振铃波纹.复原过程中,将噪声与原始图像的功率谱之比规整化为原观测图像信噪比的函数.实验结果表明,该算法对周边区域梯度变化较大的观测图像复原效果较好.

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##### 出版历程
• 收稿日期:  2006-04-30
• 刊出日期:  2006-11-30

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