Because this system uses the spectrum minutiae of the group delay spectrum to be as the sample, it can be used to compare with the traditional endpoint and bifurcation minutiae.

• 因为，本系统采用群延迟频谱的频谱特徵值取样，和传统所使用的端点与叉点特徵值相比，所需的影像前处理计算量相对地少与较少的影像增强功能；