Wavelet weighted blood vessel distortion measure for retinal images

被引：14

作者：

Nirmala, S. R. ^{[1
]}

Dandapat, S. ^{[1
]}

Bora, P. M. ^{[1
]}

机构：

[1] Indian Inst Technol Guwahati, Electro Med & Speech Technol Lab, Elect & Commun Engn Dept, Gauhati 781039, Assam, India

来源：

BIOMEDICAL SIGNAL PROCESSING AND CONTROL | 2010年 / 5卷 / 04期

关键词：

Retinal image; Blood vessel; Decomposition level; Subband distortion; WBVDM; MSSIM; COMPRESSION; QUALITY;

D O I：

10.1016/j.bspc.2010.06.005

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

In this paper, a novel wavelet transform based blood vessel distortion measure (WBVDM) is proposed to assess the image quality of blood vessels in the processed retinal images. The wavelet analysis of retinal image shows that different wavelet subbands carry different information about the blood vessels. The WBVDM is defined as the sum of wavelet weighted root of the normalized mean square error of subbands expressed in percentage. The proposed WBVDM is compared with other wavelet based distortion measures such as wavelet mean square error(WMSE), Relative WMSE(Rel WMSE) and root of the normalized WMSE(RNWMSE). The results show that WBVDM performs better in capturing the blood vessel distortion. For distortion in clinically nonsignificant regions, the proposed WBVDM shows a low value of 1.1676 compared to a large mean square error value of 7.9909. The evaluation of correlation using Pearson linear correlation coefficient (PLCC) and Spearman rank order correlation coefficient (SROCC) shows a higher value for the correlation between WBVDM and subjective score. The experimental observations show that WBVDM is able to capture the distortion in blood vessels more effectively and responds weakly to the distortion inherent in the other retinal features. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：282 / 291

页数：10

共 23 条

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