A. SUGIANA; B. S. APRILLIA; M. N. RIFQI. Obstacles Detection at a Railroad Crossing Using the Histogram of Oriented Gradients Method and Support Vector Machine Classifier. New Approaches in Engineering Research Vol. 8, [S. l.], p. 50–57, 2021. DOI: 10.9734/bpi/naer/v8/9787D. Disponível em: https://stm.bookpi.org/NAER-V8/article/view/2270. Acesso em: 4 jun. 2026.