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