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一种基于灰度相似性的指纹纹线密度提取方法
Frequency estimation of fingerprint ridge based on global-local gray-level similarity
【摘要】 提出了一种独立于纹线方向信息的方法,根据指纹整体与局部在灰度的相似性,求出具有该相似性的最小局部的尺寸,从而得到相应的纹线密度.该方法在指纹图像的各种区域都适用,很好的解决了不规则区域纹线密度的提取问题.
【Abstract】 A method independent of the orientation information is presented based on gray level similarity of a local area and its sub-samplings,computing the minimum size of the sampling with the grey level similarity,and eventually,the ridge frequency related the sampling size is obtained.The algorism can be used to all the region of the fingerprint image with good performance,especially to non-regular orientation areas.
【关键词】 指纹;
灰度相似性;
指纹纹线密度;
指纹频率;
【Key words】 fingerprint; similarity of gray-level; ridge density; ridge frequency;
【Key words】 fingerprint; similarity of gray-level; ridge density; ridge frequency;
【基金】 云南省国家级火炬计划项目(2001IT09);重庆市科技攻关重点项目(CSTC.2004AA2001-8277-02)
- 【文献出处】 云南大学学报(自然科学版) ,Journal of Yunnan University(Natural Sciences Edition) , 编辑部邮箱 ,2006年02期
- 【分类号】TP391.41
- 【被引频次】2
- 【下载频次】73