Abstract: Based on the analysis of the snake model and the prior knowledge of fingerprint images，the improved snake model is used to implement fingerprint segmentation.The experimental results show that the fingerprint segmentation algorithm based on the improved snake model is more accurate than the traditional methods，which means a higher value in practice.

Key words: fingerprint, image segmentation, Snake model, greedy alogrithm

摘要： 通过对Snake模型和指纹图像约束信息和目标形状等先验知识的分析，提出了一种基于改进的Snake模型的指纹分割算法。实验结果表明，基于改进的Snake模型的分割算法较传统的指纹分割有着更高的准确率，具有一定的应用价值。

关键词: 指纹, 图像分割, Snake模型, 贪婪算法