计算机工程与应用 ›› 2007, Vol. 43 ›› Issue (11): 27-29.

• 学术探讨 • 上一篇    下一篇

二值指纹图像方向图算法

陈大海 郭雷 常江 李海   

  1. 西北工业大学 中国科学技术大学天文与应用物理系 西北工业大学 西华师范大学物理与电子信息工程学院 四川南充
  • 收稿日期:2006-08-22 修回日期:1900-01-01 出版日期:2007-04-11 发布日期:2007-04-11
  • 通讯作者: 陈大海

Orientation map method for fingerprint binarization image

陈大海 Ocean C   

  • Received:2006-08-22 Revised:1900-01-01 Online:2007-04-11 Published:2007-04-11
  • Contact: 陈大海 Ocean C

摘要: 在指纹自动识别过程中,指纹的纹理特点决定了方向信息的重要性。图像的增强、二值化、分割、模式分类以及压缩等许多地方,都用到了方向信息。方向图是方向信息的表示方法,方向图的准确性决定了自动识别过程中各种算法的效果。本文在二值化处理的基础上,提出了一种不受背景干扰的指纹图像方向图算法,能够准确地反映了指纹模式区的纹理方向。实验证实我们的算法具有良好的鲁棒性,可用于二值化的后期处理。

关键词: 指纹, 二值图像, 方向图

Abstract: The importance of orientation information has been determined by the fingerprint texture characteristic in automatic digital fingerprint identification. The orientation information has been used in image enhancement, binarization, segmentation, pattern classification, image compression etc. The orientation image is a method for describing orientation information. The accuracy of orientation image determines the performance of the algorithm in automatic digital fingerprint identification. Based on binarized image, we proposed a new method for extracting fingerprint orientation image. The method is not sensitive to background noise and can represent the texture orientation of fingerprint pattern area accurately. Experiments show the robustness of the method, which can be used as post-processing after binnariztion.

Key words: fingerprint, binarization image, orientation image