Personal identification device and method
First Claim
1. A personal identification method comprising the steps of:
- irradiating light to a finger, extracting an image of the light transmitted through the finger, identifying said image with a registered image by local matching of a part of said image.
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Abstract
The invention aims at providing personal identification in environments where non-contact is required, with high accuracy even though using a finger vein pattern images unclear and susceptible to positional deviations, wherein it has: a means for acquiring finger vein patterns without contact; a means for carrying out rotational correction using the outline of a finger as a method of taking out a vein pattern contained in the acquired image; a means for normalizing the position of the finger image with reference to the fingertip; a means for acquiring an overall vein pattern statistically by repetitively tracking regions of dark luminance intensities for a desired length from a desired position in the image; a matching means for comparing regions where vein patterns manifest vivid features; and a means for independent matching of subregions and evaluating positional deviations where matching is recognized.
30 Citations
7 Claims
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1. A personal identification method comprising the steps of:
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irradiating light to a finger, extracting an image of the light transmitted through the finger, identifying said image with a registered image by local matching of a part of said image. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification