Convolutional Neural Networks 특징을 이용한 지문 이미지의 위조여부 판별 및 시각화
Fingerprint Liveness Detection and Visualization Using Convolutional Neural Networks Feature
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참고문헌
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초록
최근 지문 인식을 통한 사용자 인증 기술이 상용화 되면서 위조 지문 이미지 판별이 더욱 중요해졌다. 본 논문에서는CNN 특징을 이용한 위조 지문 이미지 판별 방법을 제안하였으며, CNN 모델이 실제 지문의 어느 부분에 반응하여 위조지문을 분류하는지 시각화 방법을 통해 분석하였다. 제안하는 방법은 지문영역과 배경영역을 분리하는 전처리 작업후 CNN 모델을 이용하여 지문의 위조여부를 분류한다. 지문을 단순히 생체지문과 위조지문으로 분류하는 것이 아니라위조지문을 구성하는 물질별로 분류하여 생체지문과 위조지문들에 대한 특징분석을 제공한다. 실험에 사용한 데이터베이스로는 생체 지문 이미지 6500여 장과 위조 지문 이미지 6000여 장으로 구성되어 있는 LivDet2013을 사용하였으며 위조여부에 대한 ACE 값으로 3.1%, 구성 물질 분류 정확도는 평균 79.58%를 보여 높은 수준의 분류성능을 갖고있음을 확인하였다.
Abstract
With the growing use of fingerprint authentication systems in recent years, the fake fingerprint detection is becoming more and more important. This paper mainly proposes a method for fake fingerprint detection based on CNN, it will visualize the distinctive part of detected fingerprint which provides a deeper insight in CNN model. After the preprocessing part using fingerprint segmentation, the pretrained CNN model is used for detecting the liveness detection. Not only a liveness detection but also feature analysis about the live fingerprint and fake fingerprint are provided after classifying which materials are used for making the fake fingerprint. Our system is evaluated on three databases in LivDet2013, which compromise almost 6500 live fingerprint images and 6000 fake fingerprint images in total. The proposed method achieves 3.1% ACE value about the liveness detection and achieves 79.58% accuracy on LiveDet2013.
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