Speckle noise reduction for optical coherence tomography

被引：17

作者：

Xiang, SH ^{[1
]}

Zhou, L ^{[1
]}

Schmitt, JM ^{[1
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Elect & Elect Engn, Biomed Engn Lab, Kowloon, Hong Kong

来源：

OPTICAL AND IMAGING TECHNIQUES FOR BIOMONITORING III, PROCEEDINGS OF | 1998年 / 3196卷

关键词：

speckle; optical coherence tomography; wavelets;

D O I：

10.1117/12.297921

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Optical coherence tomography (OCT) has shown great promise for non-invasive and contact-less imaging of subsurface soft tissues. However, the problem of low image contrast caused by speckle noise has limited its applications in diagnosis. This paper presents a wavelet-based method designed to improve OCT image contrast by reducing speckle noise. After transforming the image into a set of sub-images with different resolution levels in wavelet domain, we threshold high-frequency coefficients nonlinearly in horizontal, vertical, and diagonal directions. The experimental results show that wavelet processing suppresses speckle noise in OCT images of soft tissue effectively, while maintaining the sharpness of image features.

引用

页码：79 / 88

页数：10

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