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Fingerprint Image Enhancement and Rotation Schemes for a Single-Chip Fingerprint Sensor and Identifier Satoshi SHIGEMATSU Koji FUJII Hiroki MORIMURA Takahiro HATANO Mamoru NAKANISHI Namiko IKEDA Toshishige SHIMAMURA Katsuyuki MACHIDA Yukio OKAZAKI Hakaru KYURAGI Publication IEICE TRANSACTIONS on Electronics Vol.E89-C No.4 pp.540-550 Publication Date: 2006/04/01 Online ISSN: 1745-1353 DOI: 10.1093/ietele/e89-c.4.540 Print ISSN: 0916-8516 Type of Manuscript: PAPER Category: Electronic Circuits Keyword: fingerprint identification, fingerprint sensor, pixel array, pixel parallel, image processing, image rotation, Full Text: PDF(2.3MB)>>
Summary: This paper presents fingerprint image enhancement and rotation schemes that improve the identification accuracy with the pixel-parallel processing of pixels. In the schemes, the range of the fingerprint sensor is adjusted to the finger state, the captured image is retouched to obtain the suitable image for identification, and the image is rotated to the correct angle on the pixel array. Sensor and pixel circuits that provide these operations were devised and a test chip was fabricated using 0.25-µm CMOS and the sensor process. It was confirmed in 150,000 identification tests that the schemes reduce the false rejection rate to 6.17% from 30.59%, when the false acceptance rate is 0.1%. | |||||
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