ZHANG Xue-qin, LIN Ke-zheng, LI Ao. Local Pattern Feature Extraction and Recognition Based on Sparse Representation[J]. 2021, 26(4): 102-108.DOI: 10.15938/j.jhust.2021.04.014.
In order to solve the problem that the face image is not rich in features extracted under complex lighting environments,which leads to a low recognition rate,a local pattern feature extraction and recognition algorithm based on sparse representation is proposed. Firstly,the image is divided into several sub-images and the Dynamic Threshold Central-symmetric Local Binary Pattern ( DTCLBP) algorithm is used to extract features by thresholding the pixels of each sub-block and encoding the results of comparison with the central pixel values into the Central Symmetric Local Binary Pattern ( CSLBP) ; and then second-order features are extracted from the processed image by the former step using the Central Symmetric Local Derivative Pattern ( CSLDP) ; finally,the sparse representation classification algorithm is used to classify and identify the extracted features. The simulation experiments on Extended Yale B,CMU _PIE and AR face databases validate the effectiveness of the DTCLBP-CSLDP-SRC.