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Method and system for comparing of fingers impression template

机译:比较手指印模的方法和系统

摘要

A method for matching templates and a system thereof. Each template includes a plurality of data chunks, each data chunk representing a minutia and comprising a location, a minutia angle and a neighborhood. The location is represented by two coordinates. In one embodiment, each coordinate and the minutia angle are quantized. The neighborhood includes positional parameters with respect to a selected minutia for a predetermined number of neighbor minutiae. In one embodiment, a neighborhood boundary is drawn around the selected minutia and neighbor minutiae are selected from the enclosed area. A reference template is compared to a measured template on a chunk-by-chunk basis. A chunk from each of the template is loaded into a random access memory (RAM). The location, minutia angle and neighborhood of the reference data chunk are compared with the location, minutia angle and neighborhood of the measured data chunk, respectively. In one embodiment, the comparison uses straight subtractions. If the differences for all the parameters meet their respective predetermined tolerances, the measured data chunk matches the reference data chunk. If the number of data chunk matches is equal to or is greater than a predetermined data chunk match rate, the measured template matches the reference template. The neighborhoods are compared by comparing each positional parameter. If all the positional parameters match, the neighbors match. If a predetermined number of neighbor matches is met, the neighborhoods match.
机译:模板匹配的方法及其系统。每个模板包括多个数据块,每个数据块代表细节,并且包括位置,细节角度和邻域。该位置由两个坐标表示。在一个实施例中,量化每个坐标和细节角。邻域包括关于预定数目的邻居细节的所选细节的位置参数。在一个实施例中,在所选细节周围绘制邻域边界,并且从封闭区域中选择相邻细节。逐块将参考模板与测量模板进行比较。来自每个模板的块被加载到随机存取存储器(RAM)中。将参考数据块的位置,细节角和邻域分别与测量数据块的位置,细节角和邻域进行比较。在一实施例中,比较使用直接减法。如果所有参数的差都满足其各自的预定公差,则测得的数据块将与参考数据块匹配。如果数据块匹配的数量等于或大于预定数据块匹配率,则所测量的模板与参考模板匹配。通过比较每个位置参数来比较邻域。如果所有位置参数都匹配,则邻居匹配。如果满足预定数目的邻居匹配,则邻居匹配。

著录项

  • 公开/公告号DE69928297T2

    专利类型

  • 公开/公告日2006-06-01

    原文格式PDF

  • 申请/专利权人 PRECISE BIOMETRICS AB LUND SE;

    申请/专利号DE1999628297T

  • 发明设计人 RUSSO P. ANTHONY NEW YORK US;

    申请日1999-11-19

  • 分类号G06K9/00;

  • 国家 DE

  • 入库时间 2022-08-21 21:17:46

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