中国医疗设备2018，Vol.33Issue(6)：46-50,5.DOI:10.3969/j.issn.1674-1633.2018.06.012
基于小波变换的眼科光学相干层析图像降噪对比研究
Comparison of Ophthalmic Optical Coherence Tomography Image Denoising Based on Wavelet Transform Methods
摘要
Abstract
According to the noise analysis of optical coherence tomography (OCT) system, the noise reduction effects by using different wavelet transform methods in the OCT images of mouse ocular were compared. The wavelet transform methods included continuous wavelet transform, discrete wavelet transform, and stationary wavelet transform (SWT). In the present work, the image noise reduction quality were quantitatively evaluated by 4 parameters such as mean square error, root mean square error, peak signal-to-noise ratio and signal-to-noise ratio. The experiments demonstrated that the best performance of the image noise reduction was obtained by using the improved-threshold SWT method. From the denoised OCT image, it could identify the iris structure which could not be clearly observed in the original image. Compared to the original image noise, the mean square error of the denoised image was reduced to 35.5％. However, the signal-to-noise ratio and the image quality of the denoised image were increased by 25.2％ and about 4.5 dB, respectively. In summary, the SWT-based noised reduction method improves the ophthalmic OCT image quality and keeps the image details.关键词
眼科光学相干层析/小波变换/阈值/降噪Key words
ophthalmic optical coherence tomography/wavelet transform/threshold/noise reduction分类
信息技术与安全科学引用本文复制引用
罗曼婷,钟舜聪,张秋坤,林杰文,沈耀春,姚立纲..基于小波变换的眼科光学相干层析图像降噪对比研究[J].中国医疗设备,2018,33(6):46-50,5.基金项目
国家卫生和计划生育委员会科研基金(WKJ-FJ-27) （WKJ-FJ-27）
国家自然科学基金资助项目(51675103) （51675103）
福建省高校产学研重大专项(2014H6021) （2014H6021）
福建省激光精密加工工程技术中心开放基金资助项目(20150405) （20150405）
现代光学测量与激光无损检测福建省高校重点实验室开放基金资助项目(S20150405) （S20150405）
莆田学院校内科研立项项目(2017016). （2017016）
