捺印指纹图像质量NFIQ评分与专家认知规律分析

Consistency Analysis between NFIQ Score and Experts’ Identification for Fingerprint Image Quality

目的通过分析捺印指纹图像质量NFIQ评分与指纹专家认知的规律,研究NFIQ在规范捺印指纹图像采集质量工作中的可应用性。方法采用NFIQ对10万余人份十指捺印指纹图像进行评分,统计10个指位的图像质量分数分布情况;每个指位分别抽取3500份捺印指纹图像,分发给100名指纹专家进行图像质量分类;结合NFIQ评分,对指纹专家分类结果进行综合分析。结果捺印指纹图像质量NFIQ评分与指纹专家认知基本一致,即NFIQ评分越高的捺印指纹图像,被指纹专家认定为合格的比例越高。结论本文所得数据可以为公安部应用NFIQ来进一步规范捺印指纹图像采集质量提供基础数据支持。

Objective To investigate the applicability of NFIQ in standardizing the quality requirements of collecting fingerprint image by analyzing the consistency between NFIQ score and expert’s identification.Methods 100,000-plus 10-digit fingerprint images were graded to score by NFIQ,and the distribution of 10-digit fingerprints’ image quality scores was counted.For each finger,its 3500 fingerprint images were extracted and dispensed to 100 fingerprint experts for image quality rating.Compared with the NFIQ score,the fingerprint experts’ rating was comprehensively analyzed.Results The fingerprint image quality by NFIQ score is basically consistent with the fingerprint experts’ rating.Conclusions The observation obtained here can provide basic data support for MPS (ministry of public security) to further standardize the quality requirements of collecting fingerprint image by NFIQ.