维纳滤波器增强有噪高分辨电镜图像。

Wiener-filter enhancement of noisy HREM images.

机构信息

Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA.

出版信息

Ultramicroscopy. 1996 Jan;62(1-2):43-52. doi: 10.1016/0304-3991(95)00085-2.

Abstract

The use of Wiener filters to restore noisy HREM images is discussed, exploiting the fact that the noise spectrum can be rather simply estimated. Conventional Wiener, Cannon, parametric versions of these and a random-phase form are found to be very effective. Quantitative analysis indicates that the signal-to-noise ratio is improved by a factor of 3-7, with better results for larger pictures. Such filtering techniques should have rather wide applicability in electron microscopy, and could be applied on-line with TV systems.

摘要

讨论了利用维纳滤波器恢复有噪声的高分辨电子显微镜（HREM）图像，利用噪声频谱可以简单估计的事实。发现常规的维纳、坎农、这些的参数版本以及随机相位形式非常有效。定量分析表明，信噪比提高了 3-7 倍，对于较大的图像，结果更好。这种滤波技术在电子显微镜中应该有相当广泛的适用性，并且可以与电视系统在线应用。