A simple Technique for contrast stretching by the Addition, subtraction& HE of gray levels in digital image. International Journal of Advanced Research in Computer Science, [S. l.], v. 6, n. 5, p. 173–180, 2017. DOI: 10.26483/ijarcs.v6i5.2516. Disponível em: https://www.ijarcs.info/index.php/Ijarcs/article/view/2516. Acesso em: 22 feb. 2026.