Wiener-filter enhancement of noisy HREM images

被引：83

作者：

Marks, LD

机构：

[1] Dept. of Mat. Sci. and Engineering, Northwestern University, Evanston

来源：

ULTRAMICROSCOPY | 1996年 / 62卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0304-3991(95)00085-2

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

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.

引用

页码：43 / 52

页数：10

共 16 条

[1]

Andrews HC, 1977, DIGITAL IMAGE RESTOR

[2] SI(111)-5X1-AU RECONSTRUCTION AS STUDIED BY SCANNING TUNNELING MICROSCOPY [J].

BASKI, AA ;

NOGAMI, J ;

QUATE, CF .

PHYSICAL REVIEW B, 1990, 41 (14) :10247-10249

[3]

Bates R.H.T., 1989, IMAGE RESTORATION RE

[4]

CANNON TM, 1977, THESIS U UTAH SALT L

[5] UNUSUAL ISLAND STRUCTURES IN AG GROWTH ON SI(100)-(2X1) [J].

DORAISWAMY, N ;

JAYARAM, G ;

MARKS, LD .

PHYSICAL REVIEW B, 1995, 51 (15) :10167-10170

[6] APPLICATION OF CONSTRAINED LEAST-SQUARES ESTIMATION TO IMAGE RESTORATION BY DIGITAL-COMPUTER [J].

HUNT, BR .

IEEE TRANSACTIONS ON COMPUTERS, 1973, C 22 (09) :805-812

[7]

LIPSON H, 1974, J PHYS C SOLID STATE, V7, P12, DOI 10.1088/0022-3719/7/1/010

[8]

MARKS LD, UNPUB

[9]

OKEEFE MA, 1994, UNPUB COMMUNICATION

[10]

SATTLER ML, 1987, P 45 ANN EMSA M

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