指纹图像细化算法的研究

指纹识别是一种重要的生物特征鉴别技术。随着计算机技术的不断发展,自动指纹识别系统得到广泛的应用。因此进一步提高指纹识别的性能具有十分重要的意义,而指纹图像增强在指纹图像预处理过程中非常重要,直接影响指纹识别的识别率和识别速度。对指纹图像的细化算法进行了较深入的研究,分析了OPTA算法并且在OPTA算法的基础上,重新构建了细化模板,提出了一种新的细化算法.经过实验证明,该算法能够很好地满足细化的要求,细化完全彻底,细化以后的指纹骨架在纹线中心线,并保持了纹线原有的拓扑结构和细节特征,而且光滑无毛刺,运算速度也很快。

Study on the fingerprint image thinning algorithm

Fingerprint identification technique is an important biometric technology. But fingerprint identification can’t meet the need for a lot of practical applications in the rate of accuracy and the speed. So improving the performance of fingerprint recognition further is important., fingerprint Image Enhancement in the fingerprint image preprocessing is very important which affect the fingerprint recognition rate and recognition speed directly. Analysis of the OPTA algorithms and on the basis of the OPTA algorithm, the thinning templates are redesigned,and a new improved thinning algorithm is presented, Through experiments,the new algorithm has been proved to have many advantages such as complete thinning, quick speed,smooth Skeleton, center location of ridges.maintenance of minutiae,and so on.