A real-time image selection algorithm: fingerprint recognition using mobile devices with embedded camera

This paper proposes a real-time image selection algorithm for fingerprint recognition system, which uses the embedded camera of the mobile device. In general, auto-focusing algorithms of the camera system use the gradient measures to estimate high-frequency components of an image. In mobile device, images are greatly affected by environmental light sources. Therefore, obtained image might not qualify for the fingerprint recognition system, even when the image is focused. Consequently, image should be investigated whether it is usable or not. Variance-modified-Laplacian of Gaussian (VMLOG) and image quality index (QI) proposed in this paper solve such problem. VMLOG considers high-frequency component and repeatable patterns of ridges. Experimental results shows that the processing time of the proposed algorithm is enough fast to be adapted in real time system as like mobile device and the proposed algorithm selects exactly a recognizable image.

[1]  Alex Pentland,et al.  A New Sense for Depth of Field , 1985, IEEE Transactions on Pattern Analysis and Machine Intelligence.

[2]  Jay Martin Tenenbaum,et al.  Accommodation in computer vision , 1971 .

[3]  Joewono Widjaja,et al.  Wavelet transform-based autofocus camera systems , 1998, IEEE. APCCAS 1998. 1998 IEEE Asia-Pacific Conference on Circuits and Systems. Microelectronics and Integrating Systems. Proceedings (Cat. No.98EX242).

[4]  Yong-Moo Kwon,et al.  Implementation of a passive automatic focusing algorithm for digital still camera , 1995 .

[5]  K. Izumi,et al.  An Advanced Auto-Focus System for Video Camera Using Quasi Condition Reasoning , 1990, IEEE 1990 International Conference on Consumer Electronics.

[6]  Shree K. Nayar,et al.  Shape from Focus , 1994, IEEE Trans. Pattern Anal. Mach. Intell..

[7]  M.V. Shirvaikar.  An optimal measure for camera focus and exposure , 2004, Thirty-Sixth Southeastern Symposium on System Theory, 2004. Proceedings of the.

[8]  Muralidhara Subbarao.  Efficient Depth Recovery through Inverse Optics , 1989 .

[9]  Sung-Jea Ko,et al.  New autofocusing technique using the frequency selective weighted median filter for video cameras , 1999, 1999 Digest of Technical Papers. International Conference on Consumer Electronics (Cat. No.99CH36277).