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A B S T R A C T: Facial expression system has become an important and effective research area in many fields such as cognitive processes, medical care and interaction between man and computer. A facial expressions recognition system using each of FLDA with K-nearest neighbors (K-NN) classifier is introduced in this research. The system is applied to recognize various basic facial expressions such as happy, neutral, angry, disgust, sad, fear and surprise, in the Karolinska Directed Emotionaldoi:10.21271/zjpas.31.2.2 fatcat:bauj5ykrdjcvdj4anku47tlnpe