Automated identification of cataract severity using retinal fundus images

Cataract is the most prevalent cause of blindness worldwide, which accounts for more than 51% of overall blindness. The early detection of cataract can salvage impaired vision leading to blindness. Most of the existing cataract classification systems are based on traditional machine learning methods...

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Bibliographic Details
Published in:Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization Vol. 8; no. 6; pp. 691 - 698
Main Authors: Imran, Azhar, Li, Jianqiang, Pei, Yan, Akhtar, Faheem, Yang, Ji-Jiang, Dang, Yanping
Format: Journal Article
Language:English
Japanese
Published: Taylor & Francis 01.11.2020
Informa UK Limited
Subjects:
cataract detection
Convolutional neural network
image classification
retinal images
SVM
ISSN:2168-1163, 2168-1171
Online Access:Get full text
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Summary:Cataract is the most prevalent cause of blindness worldwide, which accounts for more than 51% of overall blindness. The early detection of cataract can salvage impaired vision leading to blindness. Most of the existing cataract classification systems are based on traditional machine learning methods with hand-engineered features. The manual extraction of retinal features is generally a time-taking process and requires professional ophthalmologists. Convolutional neural network (CNN) is a widely accepted model for automatic feature extraction, but it necessitates a larger dataset to evade overfitting problems. Contrarily, classification using SVM has great generalisation power to elucidate small-sample dataset. Therefore, we proposed a hybrid model by integrating deep learning models and SVM for 4-class cataract classification. The transfer learning-based models (AlexNet, VGGNet, ResNet) are employed for automatic feature extraction and SVM performs as a recogniser. The proposed architecture evaluated on 8030 retinal images with strong feature extraction and classification techniques has achieved 95.65% of accuracy. The results of this study have verified that the proposed method outperforms conventional methods and can provide a reference for other retinal diseases.
ISSN:2168-1163
2168-1171
DOI:10.1080/21681163.2020.1806733