PDF(Pubmed)
Abstract：
Fingerprint recognition systems have achieved widespread integration into various technological devices, including cell phones, computers, door locks, and time attendance machines. Nevertheless, individuals with worn fingerprints encounter challenges when attempting to unlock original fingerprint systems, which results in disruptions to their daily activities. This study explores two distinct methods for fingerprint backup: traditional fingerprint impression and 3D printing technologies. Unlocking tests were conducted on commonly available optical fingerprint lock-equipped cell phones to assess the efficacy of these methods, particularly in unlocking with worn fingerprints. The research findings indicated that the traditional fingerprint impression method exhibited high fidelity in reproducing fingerprint patterns, achieving an impressive unlocking success rate of 97.8% for imprinting unworn fingerprints. However, when dealing with worn fingerprints, the traditional fingerprint impression technique showed a reduced unlocking success rate, progressively decreasing with increasing degrees of finger wear. In contrast, 3D-printed backup fingerprints, with image processing and optimization of ridge height, mitigated the impact of fingerprint wear on the unlocking capability, resulting in an unlocking success rate of 84.4% or higher. Thus, the utilization of 3D printing technology proves advantageous for individuals with severely worn or incomplete fingerprints, providing a viable solution for unforeseen circumstances.
摘要：
指纹识别系统已经实现了广泛集成到各种技术设备中，包括手机,电脑,门锁,和考勤机。然而，佩戴指纹的个人在尝试解锁原始指纹系统时会遇到挑战，这导致他们的日常活动中断。本研究探索了两种不同的指纹备份方法：传统指纹印模和3D打印技术。对常用的装有光学指纹锁的手机进行解锁测试,以评估这些方法的功效,特别是在用磨损的指纹解锁时。研究结果表明，传统的指纹印象方法在再现指纹图案时表现出很高的保真度，实现了一个令人印象深刻的解锁成功率为97.8%的印记未磨损的指纹。然而,当处理磨损的指纹时，传统的指纹印模技术显示出降低的解锁成功率，随着手指磨损程度的增加而逐渐减少。相比之下,3D打印备份指纹,通过图像处理和优化山脊高度，减轻指纹磨损对解锁能力的影响，导致解锁成功率达到84.4%或更高。因此，3D打印技术的使用被证明对指纹严重磨损或不完整的个人有利，为不可预见的情况提供可行的解决方案。
