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Color is one of the basic features of images, which can provide very useful information and play an important role in face recognition. By using the quaternion matrix representation, the R, G, B information of each pixel is not destroyed and it can be taken as a organic body. Therefore, this paper proposes a quaternion based maximum margin criterion (QMMC) algorithm. Firstly, the quaternion number...
Sparse representation (SR) for signals over an overcomplete dictionary fascinates a lot of researchers in the past decade. The two-phase test sample sparse representation method (TPTSSR) achieved an excellent performance in face recognition. However, TPTSSR exploits the global information and tends to lose local information. In this paper, the weighted two phase test sample sparse representation method...
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