Identification apparatus
First Claim
1. An identification apparatus comprising:
- a palm pattern detector including a palm placing plate on which a palm is placed and means for generating an analog signal corresponding to the pattern of the palm;
means for converting the analog signal from said palm pattern detector into digital signals to form a palm pattern comprised of a number of binary bit data;
means for taking out the bit data corresponding to the palm contour from the bit pattern in said palm bit pattern forming means thereby to form a palm contour bit pattern;
a contour data memory for storing the contour bit pattern in said palm contour bit pattern;
slope data coding means including means for successively calculating the coordinate points of the contour bit data of the palm contour bit pattern in said memory along the palm contour, and said slope data coding means calculating the direction and degree of a slope of a segmental part of the contour line component between adjacent coordinate points and coding the slope;
curvature coding means which receives slope code data from said slope data coding means, calculates the direction and degree of a slope between adjacent line components and produces the change as a curvature code;
a feature parameter output circuit which receives the curvature code, eliminates the curvature code representing a concave part of the palm pattern, and outputs the data including the information of the convex part; and
means for receiving the feature parameter data from said feature parameter output circuit to make a personal identification.
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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.
69 Citations
10 Claims
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1. An identification apparatus comprising:
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a palm pattern detector including a palm placing plate on which a palm is placed and means for generating an analog signal corresponding to the pattern of the palm; means for converting the analog signal from said palm pattern detector into digital signals to form a palm pattern comprised of a number of binary bit data; means for taking out the bit data corresponding to the palm contour from the bit pattern in said palm bit pattern forming means thereby to form a palm contour bit pattern; a contour data memory for storing the contour bit pattern in said palm contour bit pattern; slope data coding means including means for successively calculating the coordinate points of the contour bit data of the palm contour bit pattern in said memory along the palm contour, and said slope data coding means calculating the direction and degree of a slope of a segmental part of the contour line component between adjacent coordinate points and coding the slope; curvature coding means which receives slope code data from said slope data coding means, calculates the direction and degree of a slope between adjacent line components and produces the change as a curvature code; a feature parameter output circuit which receives the curvature code, eliminates the curvature code representing a concave part of the palm pattern, and outputs the data including the information of the convex part; and means for receiving the feature parameter data from said feature parameter output circuit to make a personal identification. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification