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Analysis of PCA and LDA Features for Facial Expression Recognition Using SVM and HMM Classifiers

  • Satishkumar Varma
  • Megha Shinde
  • Satishkumar S. Chavan
Conference paper

Abstract

The face of a person is full of emotions. The emotions can be used to interact between human beings and computers. Different systems have been developed to recognize emotions. In this paper, a facial expression recognition system has been developed to recognize emotions which have four steps mainly face image acquisition, pre-processing, feature extraction and face recognition with six emotions. In the first step, a single face image was selected as an input. In the second step, this face image was converted into HSV color space and median filtering was used to remove the noise. Two methods namely Principal Component Analysis (PCA) and Linear Discriminant Analysis (LDA) have been used for feature extraction and representation in the third step. During the fourth step, the Support Vector Machine (SVM) and Hidden Markov Model (HMM) have been used to classify the given face over two different datasets. Finally, the experiments were performed by combining two feature vectors to recognize the face and the proposed system is able to recognize six basic emotions viz. happiness, sadness, anger, disgust, surprise and fear. The performance has been evaluated and presented using confusion matrix and classification accuracy. The combination of features from PCA and LDA with SVM is effective and useful for classification and recognition of facial expressions.

Keywords

Facial expression recognition Emotion classification Principal component analysis Linear discriminant analysis Support vector machine Hidden Markov model 

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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Satishkumar Varma
    • 1
  • Megha Shinde
    • 1
  • Satishkumar S. Chavan
    • 2
  1. 1.Pillai College of EngineeringNavi MumbaiIndia
  2. 2.Don Bosco Institute of TechnologyMumbaiIndia

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