K, Manikantan, Milan S Shet, Minal Patel, and Ramachandran S. “DWT-Based Illumination Normalization and Feature Extraction for Enhanced Face Recognition”. International Journal of Engineering and Technology 1, no. 4 (September 19, 2012): 483–504. Accessed August 18, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/353.