I found out how to perform the feature fusion using CCA. I wrote a Matlab code to do it and shared the code in MATLAB Central.
Detailed descriptions can be found in this paper:
M. Haghighat, M. Abdel-Mottaleb, W. Alhalabi, "Fully Automatic Face Normalization and Single Sample Face Recognition in Unconstrained Environments," Expert Systems With Applications, vol. 47, pp. 23-34, April 2016.