A. Sravya, M. Bhavana, Dr. V. Sireesha. FACE EXPRESSION DETECTION USING OPENCV. IJTIMES [Internet]. 2019 Apr. 1 [cited 2024 Jul. 15];5(4):1121-9. Available from: https://ijtimes.com/IJTIMES/index.php/ijtimes/article/view/2911