CAJ | 학술논문

从大型指纹库识别不完整或局部指纹仍然是今天的一大挑战。在此文中，我们研究利用小波变换用于指纹方向场重建问题。特别的，我们提出了一种基于小波的多尺度方法从局部的指纹重建全局拓扑表达。然后提出基于结合参数模型和非参数模型来描述重建问题，我们提供了一般表达式可用于所有有效的反变换模型的解决方案。这种方案允许我们分割保护存在的方向场同时预测丢失的未知部分的结构。我们还开发了基于脊线拓扑特征的一些先验信息来估计丢失的方向结构的算法。我们的统计实验表明我们提出的基于模型的算法能有效的恢复指纹的方向场并应用于指纹匹配，这样重大的提高了局部指纹识别其他模块性能。
종대형지문고식별불완정혹국부지문잉연시금천적일대도전。재차문중，아문연구이용소파변환용우지문방향장중건문제。특별적，아문제출료일충기우소파적다척도방법종국부적지문중건전국탁복표체。연후제출기우결합삼수모형화비삼수모형래묘술중건문제，아문제공료일반표체식가용우소유유효적반변환모형적해결방안。저충방안윤허아문분할보호존재적방향장동시예측주실적미지부분적결구。아문환개발료기우척선탁복특정적일사선험신식래고계주실적방향결구적산법。아문적통계실험표명아문제출적기우모형적산법능유효적회복지문적방향장병응용우지문필배，저양중대적제고료국부지문식별기타모괴성능。
Identifying incomplete or partial fingerprints from a large fingerprint database remains a difficult challenge today. In this paper, we investigate the problem of inverse orientation model by exploiting wavelet translation. Specifically, we propose an wavelet based multiscale approach for reconstructing the global topology representation from a partial fingerprint. Then,we present an combine parametric model and non-parametric model for describing the reconstruction problem. we provide a general expression for all valid solutions to the inverse model. This allows us to preserve data fidelity in the existing segments while exploring missing structures in the unknown parts.We have further developed algorithms for estimating the missing orientation structures based on some a priori knowledge of ridge topology features. Our statistical experiments show that our proposed model-based approach can effectively reconstruct the orientation of fingerprint and used for pair-wised fingerprint matching, and thus significantly improve the other system module performance for partial fingerprint identification.