C. G. Pachón-Suescún, J. O. Pinzón-Arenas, and R. Jiménez-Moreno, “Detection of Scratches on Cars by Means of CNN and R-CNN”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 9, no. 3, pp. 745–752, May 2019.