SOBEL OPERATOR FOR EDGES DETECTION IN SURFACE TEXTURE ANALYSIS. Jurnal Teknologi (Sciences & Engineering), [S. l.], v. 76, n. 10, 2015. DOI: 10.11113/jt.v76.5798. Disponível em: https://journals.utm.my/jurnalteknologi/article/view/5798.. Acesso em: 28 jan. 2025.