Method and system for capturing fingerprints, palm prints and hand geometry
First Claim
1. A system for capturing biometric data of a hand comprising:
- an enclosure having an opening adapted to receive a hand in a first orientation;
a low resolution camera within the enclosure, wherein the camera is positioned substantially perpendicular to the palm of the hand so as to capture the palm, fingers and thumb of the hand in a single image;
a plurality of high resolution cameras arranged in a substantially arc-shaped configuration, wherein the high resolution cameras are positioned to capture images corresponding to respective sections of a biometric region of the hand, wherein the images captured by said high resolution cameras, when combined, span the biometric region of the hand;
a plurality of lights within the enclosure positioned to illuminate each respective section of the biometric region from at least three different directions; and
a processor connected to the low resolution camera, the high resolution cameras and the lights, wherein the processor is configured to;
receive first image data of the hand positioned in the first orientation from the low resolution camera;
analyze the first image data to determine if the first orientation of the hand is in the optimal orientation;
flash the lights;
receive second image data of the respective sections of the biometric region from the high resolution cameras;
construct a gross map of the hand using the first image data;
tile the second image data onto the corresponding areas of the gross map;
match friction ridges between adjacent images of the second image data; and
perform a pixel selecting algorithm of the images in the second image data to select pixels which show the greatest contrast between the peaks and valleys of the friction ridges.
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Abstract
A system and method for capturing biometric data from a hand includes a low resolution camera for recognizing the existence of a hand and determining when the hand is in an optimal position and orientation to capture the biometric data. A plurality of high resolution cameras photographs respective sections of the palm and fingers while several lights illuminate the sections from different directions in rapid sequence. A processor then tiles together the respective images, matches the friction ridges between adjacent images, adjusts the images to account for curvature, and selects individual pixels from the several images to obtain maximum contrast. Conversions of the resulting images into standard formats, such as grayscale, black and white, or simulated rolled ink fingerprint equivalents are also included.
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Citations
23 Claims
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1. A system for capturing biometric data of a hand comprising:
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an enclosure having an opening adapted to receive a hand in a first orientation; a low resolution camera within the enclosure, wherein the camera is positioned substantially perpendicular to the palm of the hand so as to capture the palm, fingers and thumb of the hand in a single image; a plurality of high resolution cameras arranged in a substantially arc-shaped configuration, wherein the high resolution cameras are positioned to capture images corresponding to respective sections of a biometric region of the hand, wherein the images captured by said high resolution cameras, when combined, span the biometric region of the hand; a plurality of lights within the enclosure positioned to illuminate each respective section of the biometric region from at least three different directions; and a processor connected to the low resolution camera, the high resolution cameras and the lights, wherein the processor is configured to; receive first image data of the hand positioned in the first orientation from the low resolution camera; analyze the first image data to determine if the first orientation of the hand is in the optimal orientation; flash the lights; receive second image data of the respective sections of the biometric region from the high resolution cameras; construct a gross map of the hand using the first image data; tile the second image data onto the corresponding areas of the gross map; match friction ridges between adjacent images of the second image data; and perform a pixel selecting algorithm of the images in the second image data to select pixels which show the greatest contrast between the peaks and valleys of the friction ridges. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for capturing biometric data of a hand comprising:
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imaging a predefined area by capturing a plurality of images thereof with a hand in the area; analyzing each of the plurality of images to determine if the hand is in an optimal orientation to capture images of a biometric region of the hand; flashing at least one light out of a plurality of lights and capturing at least one image of at least one respective section of the biometric region during the flash of light; storing the images of respective sections of the biometric region on a storage device; constructing a gross map of the hand; tiling images of respective sections of the biometric region onto the gross map; matching the friction ridges between adjacent images of respective sections of the biometric region; and performing a pixel selection algorithm to select the pixels in the images of respective sections of the biometric region which show the greatest contrast between peaks and valleys of friction ridges on the hand. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification