Improve the two-phase test samples representation method for palmprint recognition

Palmprint recognition, as a very important personal identification technology, is taking more and more attention. A recently proposed method – two-phase test samples representation method (TPTSR) has attracted much attention and performed very well in biometrics. The TPTSR not only is a competent representation-based classification method, but also is computationally much more efficient than the original sparse representation methods. However, though the TPTSR seems to be suitable for palmprint recognition, it has not been widely tested and it is not known how to properly set the parameter (the number of the nearest neighbors), which is definitely crucial for real-world applications. This paper will analyze the performance of the method in the palmprint identification for the first time and explore the proper value of the parameter of the method. In order to address the above issues, lots of experiments on the palmprint recognition are conducted. This paper also shows experimental comparisons between TPTSR and several other methods. This paper provides significant instructions apply TPTSR to palmprint recognition.