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H. Morimura, S. Shigematsu, T. Shimamura, K. Machida and H. Kyuragi, “A Pixel-Level Automatic Calibration Circuit Scheme for Capacitive Fingerprint Sensor LSIs,” IEEE Journal of Solid-State Circuits, Vol. 37, No. 10, 2002, pp. 1300-1306. doi:10.1109/JSSC.2002.803022

has been cited by the following article:

• TITLE: Accuracy Analysis in Fingerprint Authentication Using the Fractional Fourier Transform without Misalignment Correction of Scanned Images

  AUTHORS: Reiko Iwai, Hiroyuki Yoshimura

  KEYWORDS: Fractional Fourier Transform; Fingerprint Authentication; Biometrics; Personal Information Protection

  JOURNAL NAME: International Journal of Communications, Network and System Sciences, Vol.5 No.3, March 21, 2012

  ABSTRACT: In many fingerprint authentication devices, a frame to insert the fingertip or a hollow to put the fingertip is used to avoid the position or rotation misalignment of a newly scanned genuine fingerprint image, when the fingerprint authentication is conducted. Moreover, the misalignment correction by the numerical calculation is indispensable for the fingerprint authentication devices to achieve the high accuracy. In this study, we investigated the effects of misalignment of the scanned genuine fingerprint image with the one used for generating the template on the accuracy in our fingerprint authentication method using the fractional Fourier transform (FRT). As a result, it was found that our method can achieve high authentication accuracy under the condition that the position-misalignment ratio is 17.6% or less and the rotation misalignment (rotation angle) is 28 degrees or less, even if the misalignment correction is not conducted.