Automatic Attendance System Based on Face Recognition Using HOG Features and Cosine Distance. - Thanh-Hai Nguyen 001; Cong-Tinh Dao; Nguyen-Minh-Thao Phan; Thi-Ngoc-Cham Nguyen; Tan-Tai Phan; Huynh-Ngoc Pham (FDSE (CCIS Volume), 2020)