Rismayani et al. 2025. Convolutional Neural Network with Feature Extraction to Improve the Classification Accuracy of Multi-Class Facial Skin Disorders. International Journal of Online and Biomedical Engineering (iJOE). 21, 03 (Mar. 2025), pp. 4–19. DOI:https://doi.org/10.3991/ijoe.v21i03.52631.