Farkhod Makhmudkhujaev, Md Tauhid Bin Iqbal, Md Rifat Arefin, Byungyong Ryu, Oksam Chae, Vol. 12, No. 12, December 30, 2018
10.3837/tiis.2018.12.021

• HPED
• automatic facial expression recognition
• feature extraction
• person-independent
• sampling error