Choquet Integral and Coalition Game-Based Ensemble of Deep Learning Models for COVID-19 Screening From Chest X-Ray Images

Abstract

Under the present circumstances, when we are still under the threat of different strains of coronavirus, and since the most widely used method for COVID-19 detection, RT-PCR is a tedious and time-consuming manual procedure with poor precision, the application of Artificial Intelligence (AI) and Computer-Aided Diagnosis (CAD) is inevitable. Though, some vaccines have now been authorized worldwide, it will take huge time to reach everyone, especially in developing countries. In this work, we have analyzed Chest X-ray (CXR) images for the detection of the coronavirus. The primary agenda of this proposed research study is to leverage the classification performance of the deep learning models using ensemble learning. Many papers have proposed different ensemble learning techniques in this field, some methods using aggregation functions like Weighted Arithmetic Mean (WAM) among others. However, none of these methods take into consideration the decisions that subsets of the classifiers take. In this paper, we have applied Choquet integral for ensemble and propose a novel method for the evaluation of fuzzy measures using coalition game theory, information theory, and Lambda fuzzy approximation. Three different sets of fuzzy measures are calculated using three different weighting schemes along with information theory and coalition game theory. Using these three sets of fuzzy measures, three Choquet integrals are calculated and their decisions are finally combined. Besides, we have created a database by combining several image repositories developed recently. Impressive results on the newly developed dataset and the challenging COVIDx dataset support the efficacy and robustness of the proposed method. Our experimental results outperform many recently proposed methods. Source code of this work is available at https://github.com/ subhankar01/Covid-Chestxray-lambda-fuzzy

COVID-19 diagnosis via chest X-ray image classification based on multiscale class residual attention

“…CXR is a common imaging modality that can provide an effective medical diagnosis. To achieve effective screening of patients with COVID-19, many experiments using deep learning to detect COVID-19 have been conducted [ [46] , [47] , [48] , [49] , [50] , [51] , [52] ]. However, the shortage of labeled data may affect the detection performance of COVID-19.…”

Game Theory-Based Dynamic Weighted Ensemble for Retinal Disease Classification

“…In the discipline of medical information analysis and decision making, game theory is in its infancy. Coalition game and choquet integral-based deep learning model has been proposed by Bhowal et al for Covid-19 screening from chest X-ray images [18]. Game theory and tree decomposition techniques have been applied to random forest predictor to work towards the prediction of dual molecular diagnosis cases by Versbraegen et al [19].…”

Evaluation of Fuzzy Measures Using Dempster–Shafer Belief Structure: A Classifier Fusion Framework

“…As can be observed from Table VI, the proposed method beats almost all existing methods barring [25] which used a complex attention-based module. 2) Novel Covid-19 Chestxray Repository: We have evaluated our proposed DS-based fuzzy ensemble approach on the Novel COVID-19 Chestxray Repository proposed in [40]. We have compared our method with the existing techniques.…”

“…The results have been tabulated in Table VI. Bhowal et al [40] developed a method of calculating the fuzzy measures of individual classifiers using Coalition game theory and Information Theory before using the lambda fuzzy approximation for calculating the fuzzy measures of the set of classifiers. They also incorporated three different weighting schemes for calculating the Shapley values.…”