Comparison of Feature Extraction with PCA and LTP Methods and Investigating the Effect of Dimensionality Reduction in the Bat Algorithm for Face Recognition

(1) Azita Mousavi Mail (San Francisco Bay University, United States)
(2) Hadis Arefanjazi Mail (Binghamton University, United States)
(3) Mona Sadeghi Mail (Payam Noor University, Iran, Islamic Republic of)
(4) Ali Mojarrad Ghahfarokhi Mail (University of Michigan, United States)
(5) Fatemehalsadat Beheshtinejad Mail (Islamic Azad University, Iran, Islamic Republic of)
(6) * Mahsa Madadi Masouleh Mail (University of Victoria, Canada)
*corresponding author

Abstract


Face recognition is one of the challenging subjects of image processing. Facial recognition is often a biometric method that basically uses faces to recognize people. The face recognition system consists of three main steps: finding the face in the image, feature extraction and classification. The face recognition system faces challenges such as changes in lighting, changes in age, changes in facial expressions, etc. One of the important issues in this system is the algorithm execution speed. For this purpose, the dimensions of the feature vectors should be small enough, especially when the database is large. Since the face recognition system must be performed on a wide range of databases, dimensionality reduction techniques are required to reduce time and increase accuracy. Dimension reduction methods are used for this purpose. Two methods of dimensionality reduction, including LTP and PCA, are given in this research. In this research, first, the LTP feature vectors are extracted from the face image, and then the effective features are selected using the Bat algorithm. Therefore, this algorithm has three main phases of feature extraction, feature selection and classification. This algorithm is implemented on the ORL database, which contains 400 images of 40 different people with a size of 112×92 pixels. In addition to reducing the time required for testing, the proposed method has provided a very good accuracy of 99%.

Keywords


Bat algorithm; Face recognition; Local Ternary Pattern; Principal Component Analysis

   

DOI

https://doi.org/10.31763/ijrcs.v3i3.1057
      

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