Importance

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Abstract

A palm pattern detector detects a palm pattern and produces an analog signal corresponding to the palm pattern. The analog signal is converted into a palm bit pattern corresponding to a palm pattern comprised of a number of bit data. Bit data corresponding to the contour of a palm from the palm bit pattern is read out and a contour bit pattern is formed. A displacement between adjacent bit data of the contour bit pattern is detected and is coded into slope code information. A slope change between adjacent line components of the palm contour is detected from adjacent slope code information to obtain a curvature code information. The curvature code information representing a concave part of the palm contour is removed from the curvature code information and the curvature code information reperesenting the convex part is used as a personal feature parameter in the personal identification.

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First Claim