M. . Zarkasih, “Conceptual Paper: Digital Image Processing for KPI of ‘Office Boy’ Employee”, Informatics, vol. 6, no. 11, pp. 14–22, Jan. 2021, Accessed: Apr. 12, 2026. [Online]. Available: http://ojs.journals.unisel.edu.my/index.php/icf/article/view/78