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한민수(Min-su Han),류병용(Byungyong Ryu),김재면(Jaemyun Kim),송기훈(Gihun Song),채옥삼(Oksam Chae) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.6
We propose a novel local micro pattern, Symmetric Directional Pattern (SDP), in order to perform facial expression recognition. SDP extracts edge directions and responses information from the local neighbors using symmetric Sobel masks, and encodes the prominent direction effectively. According to magnitude of edge responses, SDP deals with edge texture and smooth areas differently. With these properties, SDP becomes robust against random noise and illumination changes, and provides better discrimination power about other existing expression databases also present the outstanding recognition accuracy of the proposed method.