Automatic COVID-19 detection using exemplar hybrid deep features with x-ray images

Barua, Prabal Datta and Muhammad Gowdh, Nadia Fareeda and Rahmat, Kartini and Ramli, Norlisah and Ng, Wei Lin and Chan, Wai Yee and Kuluozturk, Mutlu and Dogan, Sengul and Baygin, Mehmet and Yaman, Orhan and Tuncer, Turker and Wen, Tao and Cheong, Kang Hao and Acharya, U. Rajendra (2021) Automatic COVID-19 detection using exemplar hybrid deep features with x-ray images. International Journal of Environmental Research and Public Health, 18 (15). ISSN 1660-4601, DOI

Full text not available from this repository.


COVID-19 and pneumonia detection using medical images is a topic of immense interest in medical and healthcare research. Various advanced medical imaging and machine learning techniques have been presented to detect these respiratory disorders accurately. In this work, we have proposed a novel COVID-19 detection system using an exemplar and hybrid fused deep feature generator with X-ray images. The proposed Exemplar COVID-19FclNet9 comprises three basic steps: exemplar deep feature generation, iterative feature selection and classification. The novelty of this work is the feature extraction using three pre-trained convolutional neural networks (CNNs) in the presented feature extraction phase. The common aspects of these pre-trained CNNs are that they have three fully connected layers, and these networks are AlexNet, VGG16 and VGG19. The fully connected layer of these networks is used to generate deep features using an exemplar structure, and a nine-feature generation method is obtained. The loss values of these feature extractors are computed, and the best three extractors are selected. The features of the top three fully connected features are merged. An iterative selector is used to select the most informative features. The chosen features are classified using a support vector machine (SVM) classifier. The proposed COVID-19FclNet9 applied nine deep feature extraction methods by using three deep networks together. The most appropriate deep feature generation model selection and iterative feature selection have been employed to utilise their advantages together. By using these techniques, the image classification ability of the used three deep networks has been improved. The presented model is developed using four X-ray image corpora (DB1, DB2, DB3 and DB4) with two, three and four classes. The proposed Exemplar COVID-19FclNet9 achieved a classification accuracy of 97.60%, 89.96%, 98.84% and 99.64% using the SVM classifier with 10-fold cross-validation for four datasets, respectively. Our developed Exemplar COVID-19FclNet9 model has achieved high classification accuracy for all four databases and may be deployed for clinical application.

Item Type: Article
Funders: University Malaya Research Grant [Grant No: CSRG002 -2020ST], Singapore University of Technology & Design [Grant No: SRG SCI 2019 142]
Uncontrolled Keywords: Exemplar COVID-19FclNet9; Deep feature generation; Transfer learning; COVID-19 detection; Iterative NCA
Subjects: T Technology > TD Environmental technology. Sanitary engineering
Divisions: Faculty of Medicine
Depositing User: Ms Zaharah Ramly
Date Deposited: 30 May 2022 07:24
Last Modified: 30 May 2022 07:24

Actions (login required)

View Item View Item