Rani, Sheela, Vuyyuru Tejaswi, Bonthu Rohitha, and Bhimavarapu Akhil. “Pre Filtering Techniques for Face Recognition Based on Edge Detection Algorithm”. International Journal of Engineering and Technology 7, no. 1.1 (December 21, 2017): 213–218. Accessed August 18, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/9469.