Speckle reduction in optical coherence tomography images by use of a spatially adaptive wavelet filter

被引：234

作者：

Adler, DC

Ko, TH

Fujimoto, JG

机构：

[1] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

[2] MIT, Elect Res Lab, Cambridge, MA 02139 USA

来源：

OPTICS LETTERS | 2004年 / 29卷 / 24期

关键词：

D O I：

10.1364/OL.29.002878

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A spatially adaptive two-dimensional wavelet filter is used to reduce speckle noise in time-domain and Fourier-domain optical coherence tomography (OCT) images. Edges can be separated from discontinuities that are due to noise, and noise power can be attenuated in the wavelet domain without significantly compromising image sharpness. A single parameter controls the degree of noise reduction. When this filter is applied to ophthalmic OCT images, signal-to-noise ratio improvements of >7 dB are attained, with a sharpness reduction of <3%. (C) 2004 Optical Society of America.

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页码：2878 / 2880

页数：3

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