I. INTRODUCTION
As human-friendliness has been increasingly emphasized in
the intelligent system’s area, many different applications have
been developing in the field of biometric identification.
Recently much attention has been devoted to the use of human
gait patterns as a biometric. As a biology feature, gait has its
unique characteristics such as appreciable, non-invasive,
without people’s attention, difficult to disguise and has little
affect when environment changed. So, the study of human gait,
as well as its deployment as a biometric for identification
purposes, is currently an active research area.