Dual-LED Imaging System for Secure and Robust Fingerprint Detection
Ichiro Fujieda, Katsuki Tai, Etsuji Matsuyama,
and Masashi Kurita
Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga 525-8577, Japan
Counterfeiting is an important issue in unattended fingerprint identification. To help prevent this, we have proposed to look at the finger color changes during an input action. When a finger is pressed against an optical fingerprint sensor, it is gradually deformed and the color of the fingerprint images changes. This is due to the blood movements inside the finger. If the extent of this color change exceeds a certain threshold, the finger is judged to be real. We start by describing the spectral changes in light scattered by the pressed finger. As the pressure applied to the finger increases, the relative intensity of the red portion of the spectrum decreases. Second, we discuss a dual-LED imaging system based on scattered light detection. Here, two LEDs with peak emissions at 530nm and 630nm are mounted on the edge of a plastic plate serving as a light-guide. Light scattered by a finger on the light-guide is captured by a standard color camera. Using eight types of replicas and live fingers of 42 volunteers, we have acquired series of images during an input action. For each finger, three input actions have been recorded. Analysis of this database of 150 input trials shows that our imaging system can differentiate the live fingers and the replicas clearly. We have investigated signal extraction process for a reliable differentiation. The imaging system is adequately robust against temperature fluctuation in a finger and it can be used under illumination of 3050 lux.
and Masashi Kurita, “Dual-LED Imaging System for Secure and Robust Fingerprint Detection,” J. Robot. Mechatron., Vol.18, No.6, pp. 714-721, 2006.
-  T. van der Putte and J. Keuning, “Biometrical fingerprint recognition: don’t get your finger burned,” in Proceedings of the Fourth Working Conference on Smart Card Research and Advanced Applications, Kluwer Academic, pp. 289-303, 2000.
-  K. Yamada, H. Matsumoto, and T. Matsumoto, “Can we make artificial fingers that fool fingerprint systems? (part 3),” presented at The 2001 Symposium on Cryptography and Information Security, Oiso, Japan, Jan. 23-26, 2001.
-  L. Thalheim, J. Krissler, and P.-M. Ziegler, “Body check,” translated by Robert W. Smith,
-  I. Fujieda, E. Matsuyama, and M. Kurita, “Signatures of live fingers extracted from a series of fingerprint images,” in Sensors and Camera Systems for Scientific and Industrial Applications VI, M. M. Blouke (ed.), Proc. Of SPIE, Vol.5677, pp. 177-185, 2005.
-  I. Konishi, Y. Ito, N. Sakauchi, M. Kobayashi, and Y. Tsunazawa, “A new optical imager for hemoglobin distribution in human skin,” Optical Review, Vol.10, No.6, pp. 592-595, 2003.
-  T. Ozawa, Y. Ikeda, T. Saitou, and S. Numada, “Non invasive measurement for hemoglobin concentration using reflective near infrared spectroscopic imaging method,” Japan Soc. ME&BE, N2-0201, Nov., 2004, Dogo, Matsuyama, Japan (in Japanese).
-  K. A. Nixon and R. K. Rowe, “Multispectral fingerprint imaging for spoof detection,” to be published in Biometric Technology for Human Identification II, A. K. Jain and N. K. Ratha (Eds.), Proc. of SPIE, Vol.5779, 2005.
-  I. Fujieda and H. Haga, “Fingerprint input based on scattered light detection,” Applied Optics, Vol.36, No.35, pp. 9152-9156, 1997.
-  K. Tai, M. Kurita, and I. Fujieda, “Recognition of living fingers with a sensor based on scattered-light detection,” Applied Optics, Vol.45, No.3, pp. 419-424, 2006.
-  M. Kurita, K. Tai, and I. Fujieda, “Multi-spectral imaging of fingerprints for secure biometric systems,” Proc. IS&T/SID, 13th Color Imaging Conf., pp. 251-255, 2005.
-  K. Tai, M. Kurita, and I. Fujieda, “Dual-LED imaging for finger liveliness detection and its evaluation with replicas,” Vol.45, No.24, pp. 6263-6269, 2006.
-  M. Kobayashi, “Color reproduction/color management/color appearance,” Journal of the Color Science Association of Japan, Vol.26, No.1, pp. 18-29, 2002 (in Japanese).
Copyright© 2006 by Fuji Technology Press Ltd. and Japan Society of Mechanical Engineers. All right reserved.