Pixel-Parallel Image-Matching Circuit Schemes for a Single-Chip Fingerprint Sensor and Identifier(Electronic Circuits)
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概要
- 論文の詳細を見る
This paper describes pixel-parallel image-matching circuit schemes that provide the optimal binarization, the high-speed low-power comparison, and the accurate matching of fingerprint images needed for fingerprint verification. Image binarizing is adjusted adaptively during the fingerprint sensing operation. The obtained image is compared with the template in the pixel array, and the results from all of the pixels are totaled by a variable-delay circuit at high speed and low power. For accurate matching, the image is scanned by shifting it in the pixel array while maintaining whole image. The experimental results demonstrate that the proposed schemes provide optimal binary images of most fingers under any condition and environment, 11-μs 147-μW totaling of results from 20,584 pixels, and wide-range image scanning and accurate matching for fingerprint images. These schemes are effective for fast and low-power fingerprint verification for a single-chip fingerprint sensor and identifier.
- 社団法人電子情報通信学会の論文
- 2005-05-01
著者
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Shigematsu Satoshi
Ntt Microsystem Integration Lab. Kanagawa Jpn
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MACHIDA Katsuyuki
NTT Microsystem Integration Laboratories
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MORIMURA Hiroki
NTT Microsystem Integration Laboratories
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OKAZAKI Yukio
NTT Microsystem Integration Laboratories
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KYURAGI Hakaru
NTT Microsystem Integration Laboratories
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MACHIDA Katsuyuki
NTT Advanced Technology Corporation
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Okazaki Yukio
Ntt Microsystem Integration Laboratories Ntt Corporation
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Kyuragi H
Ntt Microsystem Integration Laboratories Ntt Corporation
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Morimura Hiroki
Ntt Microsystem Integration Laboratories Ntt Corporation
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Machida K
Ntt Advanced Technology Corporation
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