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- W2020099183 abstract "Blood movement inside a finger causes color changes in a fingerprint image during a fingerprint input action. We consider models to relate this information to the stiffness of a collective blood vessel in a finger. In the simple resistor model, finger area is regarded as voltage and the color change was regarded as current. We define its resistance as the ratio of these two quantities according to Ohm's law. However, experiments show that this resistance value increases as the force applied to a finger increases. Second, we consider the variable resistor model to account for this force dependency. We assume that the driving force decreases the cross-section of the blood vessel and that stress and strain are related by Young's modulus. Experiments by six participants show reasonably good fittings for the extracted signals and the model's predictions. The correlation coefficient between the extracted parameter and the average blood pressures of the participants was 0.75." @default.
- W2020099183 created "2016-06-24" @default.
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- W2020099183 date "2008-02-07" @default.
- W2020099183 modified "2023-10-10" @default.
- W2020099183 title "Simple models for color changes in a finger during a fingerprint input action" @default.
- W2020099183 doi "https://doi.org/10.1117/12.762719" @default.
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