关键词: 主动形状模型, 瞳孔定位, 边缘约束, 自适应步长, 人脸识别

Abstract: In view of the traditional Active Shape Model（ASM） method’s flaw and insufficiency，the paper proposes several improvements methods.The traditional ASM method carries on the characteristic search using of the initial point which has provided using the person face examination；in the improved algorithm，the paper has used the method of pupil orientation on the initialization and adopted improvement methods of edge restraint，auto-adapted length of stride to effectively improved the ASM method performance.The experimental result indicates that，the improved ASM method has a bigger enhancement in the accuracy and robustness.

Key words: Active Shape Model（ASM）, pupil orientation, edge restraint, auto-adapted length of stride, face recognition