KUMEECHAI, P.; RATTANAKREEP, P.; OLARNKIJANAN, T.; SUCHATO, N. An Automatic OMR System Using Digital Image Processing with Hybrid K-Means and K-Nearest Neighbor Classification. NKRAFA JOURNAL OF SCIENCE AND TECHNOLOGY, [S. l.], v. 22, n. 2, p. 214–234, 2026. Disponível em: https://ph02.tci-thaijo.org/index.php/nkrafa-sct/article/view/261327. Acesso em: 16 sep. 2026.