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潜在掌纹匹配。

Latent palmprint matching.

作者信息

Jain Anil K, Feng Jianjiang

机构信息

Department of Computer Science and Engineering, Michigan State University, 3115 Engineering Building, East Lansing, MI 48824-1226, USA.

出版信息

IEEE Trans Pattern Anal Mach Intell. 2009 Jun;31(6):1032-47. doi: 10.1109/TPAMI.2008.242.

Abstract

The evidential value of palmprints in forensic applications is clear as about 30 percent of the latents recovered from crime scenes are from palms. While biometric systems for palmprint-based personal authentication in access control type of applications have been developed, they mostly deal with low-resolution (about 100 ppi) palmprints and only perform full-to-full palmprint matching. We propose a latent-to-full palmprint matching system that is needed in forensic applications. Our system deals with palmprints captured at 500 ppi (the current standard in forensic applications) or higher resolution and uses minutiae as features to be compatible with the methodology used by latent experts. Latent palmprint matching is a challenging problem because latent prints lifted at crime scenes are of poor image quality, cover only a small area of the palm, and have a complex background. Other difficulties include a large number of minutiae in full prints (about 10 times as many as fingerprints), and the presence of many creases in latents and full prints. A robust algorithm to reliably estimate the local ridge direction and frequency in palmprints is developed. This facilitates the extraction of ridge and minutiae features even in poor quality palmprints. A fixed-length minutia descriptor, MinutiaCode, is utilized to capture distinctive information around each minutia and an alignment-based minutiae matching algorithm is used to match two palmprints. Two sets of partial palmprints (150 live-scan partial palmprints and 100 latent palmprints) are matched to a background database of 10,200 full palmprints to test the proposed system. Despite the inherent difficulty of latent-to-full palmprint matching, rank-1 recognition rates of 78.7 and 69 percent, respectively, were achieved in searching live-scan partial palmprints and latent palmprints against the background database.

摘要

掌纹在法医应用中的证据价值是显而易见的,因为从犯罪现场提取的潜在指纹中约有30%来自手掌。虽然已经开发出用于访问控制类型应用中基于掌纹的个人身份验证的生物识别系统,但它们大多处理低分辨率(约100 ppi)的掌纹,并且只进行全掌纹到全掌纹的匹配。我们提出了一种法医应用中所需的潜在掌纹到全掌纹匹配系统。我们的系统处理以500 ppi(法医应用中的当前标准)或更高分辨率捕获的掌纹,并使用细节特征以与潜在指纹专家使用的方法兼容。潜在掌纹匹配是一个具有挑战性的问题,因为在犯罪现场提取的潜在指纹图像质量差,只覆盖手掌的一小部分,并且背景复杂。其他困难包括全掌纹中有大量细节特征(约为指纹的10倍),以及潜在指纹和全掌纹中存在许多褶皱。开发了一种可靠地估计掌纹中局部纹路方向和频率的鲁棒算法。这即使在质量较差的掌纹中也便于提取纹路和细节特征。利用一种固定长度的细节特征描述符MinutiaCode来捕获每个细节特征周围的独特信息,并使用基于对齐的细节特征匹配算法来匹配两个掌纹。将两组部分掌纹(150个活体扫描部分掌纹和100个潜在掌纹)与一个包含10200个全掌纹的背景数据库进行匹配,以测试所提出的系统。尽管潜在掌纹到全掌纹匹配存在固有困难,但在针对背景数据库搜索活体扫描部分掌纹和潜在掌纹时,分别实现了78.7%和69%的一级识别率。

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