An Efficient Transfer Learning Hybrid Model for Multiclass Brain Tumor Classification
Keywords:
Brain Tumor, Transfer Learning, Residual CNN, EfficientNetV2B3, ResNetV2, Multiclass Tumor, Confusion Matrix, Accuracy, CLAHEAbstract
Brain tumors are the most dangerous diseases today. Brain tumors have come second among the diseases that cause the most deaths in the world. Conventional techniques used to diagnose brain tumors are time-consuming and prone to error. Transfer learning algorithms have also been used to detect brain tumors and are still being used extensively. After studying the previous research paper, we found two shortcomings. First of all, in most of the work, researchers modified a particular Convolutional Neural Network, which found only the features of that Convolutional Neural Network, and the second one mostly worked on a single-class detection, which means that the model will detect whether the given input image is tumorous or not. However, these models are not able to identify the multiclass tumors. Keeping both these things in mind, in this research paper, we have introduced a hybrid multilabel classifier model in which ResNetV2 and EfficientNetV2B3 have been combined to get their best features with ImageNet weights. Combining ResNetV2 (the best Residual Convolutional Network for multilayer and multiclass classification) and EfficientNetV2B3 (the best Convolutional network for faster calculation) helped us to deploy a faster multilayered classifier model. The last 30 layers of both have been trained accordingly, and 16 custom layers have been included. The dataset contains 3 types of tumor images (glioma, meningioma, and pituitary) and non-tumor images. The model was trained with 4569 human Brain MRI images and then validated with 1143 images. The model was tested on 1311 images, and its performance was measured for multiclass tumors. The overall accuracy of the presented model was measured at 100% during training and 99.1% during testing, which shows that our model works very accurately. As a multiclass classifier, it achieved maximum accuracy value, maximum recall value, maximum precision value, and maximum F-1 score value of 99.1% (all classes), 100.00% (Pituitary and No tumor classes), 100.00% (No Tumor class), and 100.00% (No Tumor Class), respectively.
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