![]() ![]() The proposed model achieved uniformly good performance on five different datasets, consisting of chest CT scans and chest x-rays images. The performance of the proposed model was compared with two other ensemble models, baseline pre-trained computer vision models and existing models for COVID-19 detection. Five different chest CT scans and chest x-ray images were used to train and evaluate the proposed model. After an exhaustive search, three best-performing diverse models were selected to design a weighted average-based heterogeneous stacked ensemble. From each pre-trained model, the potential candidates for base classifiers were obtained by varying the number of additional fully-connected layers. Four pre-trained DL models were considered: Visual Geometry Group (VGG 19), Residual Network (ResNet 101), Densely Connected Convolutional Networks (DenseNet 169) and Wide Residual Network (WideResNet 50 2). The proposed model is a stacked ensemble of heterogenous pre-trained computer vision models. This paper proposes a novel stacked ensemble to detect COVID-19 either from chest CT scans or chest x-ray images of an individual.
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