由于指纹识别技术具有很高的实用性和可行性，因此是一种理想的身份认证技术。但目前的指纹特征提取算法却很难保证同时具有可靠性和高效率。为了准确快速地提取指纹特征，在进行有效域捕捉，并结合脊线跟踪的基础上，提出了一种快速的指纹细节提取方法。该方法先通过核心点的检测来确定有效的指纹面积，并且在处理过程中降低了对图像增强的依赖；然后对确定了指纹面积的图像进行脊线跟踪。实验结果表明，该方法不仅有较高的可靠性和效率，而且能较好地平衡它们两者的矛盾。

Finger print recognition technology is practical and feasible. It is a valuable ID recognition technology. The algorithm we commonly use now cannot provide reliability and high efficient at the same time. Based on effective area capturing and ridges tracing, this article advances an efficient fingerprint extraction algorithm. To capture the effective area and lower down the dependence to the image quality,we first check the core point. Then the tracing ridge is used to extract strange points. Experimental results show that this algorithm can balance the practicality and feasibility at the same time.