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Improving Retinal Image Quality Using Registration with an SIFT Algorithm in Quasi-Confocal Line Scanning Ophthalmoscope.
He, Yi; Wang, Yuanyuan; Wei, Ling; Li, Xiqi; Yang, Jinsheng; Zhang, Yudong
2017
发表期刊Advances in experimental medicine and biology
ISSN0065-2598
卷号977页码:183-190
摘要When high-magnification images are taken with a quasi-confocal line scanning ophthalmoscope (LSO), the quality of images always suffers from Gaussian noise, and the signal to noise ratio (SNR) is very low for a safer laser illumination. In addition, motions of the retina severely affect the stabilization of the real-time video resulting in significant distortions or warped images. We describe a scale-invariant feature transform (SIFT) algorithm to automatically abstract corner points with subpixel resolution and match these points in sequential images using an affine transformation. Once n images are aligned and averaged, the noise level drops by a factor of [Formula: see text] and the image quality is improved. The improvement of image quality is independent of the acquisition method as long as the image is not warped, particularly severely during confocal scanning. Consequently, even better results can be expected by implementing this image processing technique on higher resolution images.
关键词Confocal microscopy Feature extraction Image matching SIFT
语种英语
文献类型期刊论文
条目标识符http://ir.ioe.ac.cn/handle/181551/8768
专题自适应光学技术研究室(八室)
作者单位The Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu, 610209, China. heyi_job@126.com.
推荐引用方式
GB/T 7714
He, Yi,Wang, Yuanyuan,Wei, Ling,et al. Improving Retinal Image Quality Using Registration with an SIFT Algorithm in Quasi-Confocal Line Scanning Ophthalmoscope.[J]. Advances in experimental medicine and biology,2017,977:183-190.
APA He, Yi,Wang, Yuanyuan,Wei, Ling,Li, Xiqi,Yang, Jinsheng,&Zhang, Yudong.(2017).Improving Retinal Image Quality Using Registration with an SIFT Algorithm in Quasi-Confocal Line Scanning Ophthalmoscope..Advances in experimental medicine and biology,977,183-190.
MLA He, Yi,et al."Improving Retinal Image Quality Using Registration with an SIFT Algorithm in Quasi-Confocal Line Scanning Ophthalmoscope.".Advances in experimental medicine and biology 977(2017):183-190.
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