Obstacles Detection Technique for Visually Impaired. International Journal of Multidisciplinary and Current Research, [S. l.], v. 1, n. 3, p. 253–260, 2013. Disponível em: https://ijmcr.com/index.php/ijmcr/article/view/01.03.24. Acesso em: 2 may. 2026.