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Basal Cell Carcinoma (BCC) is the most prevalent type of skin cancer, accounting for three-quarters of all cancer cases. It is often confused with other benign lesions, such as Acne Vulgaris (AV). In this paper, we propose a classification approach to discriminate BCC from AV in dermoscopic images, using an algorithm based on deep learning techniques.
A two-branch Convolutional Neural Network (CNN) is employed to construct the model. The first branch consists of CNN structures that process an RGB dermoscopic image, while the second branch leverages the pre-trained ResNet18 network with an HSV dermoscopic image input. Both branches use Principal Component Analysis (PCA), normalization, and image resizing. This concatenated architecture enables the system to exploit features extracted from both color spaces as well as CNN networks, enhancing the overall performance of the model.
The proposed architecture is assessed using two public datasets. The first one is dedicated to the binary classification of Basal Cell Carcinoma (BCC) versus Acne Vulgaris (AV), achieving an accuracy of 99.06%, a sensitivity of 98.73%, and a specificity of 99.37%. The second dataset addresses multiclass classification along melanoma, BCC, and AV, and achieves an accuracy of 97.17%, a sensitivity of 97.13%, and a specificity of 98.57%. The results highlight the effectiveness of the proposed model.
The dual-input hybrid algorithm, based on convolutional neural networks and incorporating principal component analysis, demonstrates promising results in distinguishing BCC from AV.