SkinCNN: Classification of Skin Cancer Lesions with A Novel CNN Model

Year 2023, , 1105 - 1116, 28.12.2023

İbrahim Çetiner

https://doi.org/10.17798/bitlisfen.1338180

Abstract

Recently, there has been an increase in the number of cancer cases due to causes such as physical inactivity, sun exposure, environmental changes, harmful drinks and viruses. One of the most common types of cancer in the general population is skin cancer. There is an increase in exposure to the sun's harmful rays due to reasons such as environmental changes, especially ozone depletion. As exposure increases, skin changes occur in various parts of the body, especially the head and neck, in both young and old. In general, changes such as swelling in skin lesions are diagnosed as skin cancer. Skin cancers that are frequently seen in the society are known as actinic keratosis (akiec), basal cell carcinoma (bcc), bening keratosis (bkl), dermatofibroma (df), melanoma (mel), melanocytic nevi (nv), and vascular (vasc) types. It is not possible to consider all possible skin changes as skin cancer. In such a case, the development of a decision support system that can automatically classify the specified skin cancer images will help specialized healthcare professionals. For these purposes, a basic model based on MobileNet V3 was developed using the swish activation function instead of the ReLU activation function of the MobileNet architecture. In addition, a new CNN model with a different convolutional layer is proposed for skin cancer classification, which is different from the studies in the literature. The proposed CNN model (SkinCNN) achieved a 97% success rate by performing the training process 30 times faster than the pre-trained MobileNet V3 model. In both models, training, validation and test data were modelled by partitioning according to the value of cross-validation 3. MobileNet V3 model achieved F1 score, recall, precision, and accuracy metrics of 0.87, 0.88, 0.84, 0.83, 0.84, and 0.83, respectively, in skin cancer classification. The SkinCNN obtained F1 score, recall, precision, and accuracy metrics of 0.98, 0.97, 0.96, and 0.97, respectively. With the obtained performance metrics, the SkinCNN is competitive with the studies in the literature. In future studies, since the SkinCNN is fast and lightweight, it can be targeted to run on real-time systems.

Keywords

MobileNet V3, CNN, Skin cancer, Transfer learning, Classification

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