ผลิศร ว. An Investigation of the Color and Density of Different Multiple Choice Answer Sheet Input Factors Using Image Processing Techniques. Journal of Industrial Education, [S. l.], v. 13, n. 3, p. 19–25, 2014. Disponível em: https://ph01.tci-thaijo.org/index.php/JIE/article/view/125078. Acesso em: 28 mar. 2024.