A. Radhiyah, T. Harsono and R. Sigit, "Comparison study of Gaussian and histogram equalization filter on dental radiograph segmentation for labelling dental radiograph," 2016 International Conference on Knowledge Creation and Intelligent Computing (KCIC), Manado, 2016, pp. 253-258. doi: 10.1109/KCIC.2016.7883655