“Study of the Detection System for Onscreen Contents Shooting (Countermeasure against Information Leakage by Video Recording/Photo Shooting) ”, IJIEE, vol. 4, no. 3, pp. 256–263, May 2014, Accessed: Aug. 27, 2026. [Online]. Available: https://www.ijiee.org/index.php/ijiee/article/view/577