【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.更多还原

【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.更多还原