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, andidentifying said image with a registered image by local matching of a part of said image,wherein said local matching is processed by dividing said image and the registered image into a plurality of subregions and obtaining location information of the matching subregions, acquiring an extent of deviation of matching as movement information in each subregion from the initial location and evaluating correlativity of the movement information in each subregion.
0 Assignments
0 Petitions
Accused Products
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.
26 Citations
6 Claims
-
1. A personal identification method comprising the steps of:
-
irradiating light to a finger, extracting an image of the light transmitted through the finger, and identifying said image with a registered image by local matching of a part of said image, wherein said local matching is processed by dividing said image and the registered image into a plurality of subregions and obtaining location information of the matching subregions, acquiring an extent of deviation of matching as movement information in each subregion from the initial location and evaluating correlativity of the movement information in each subregion. - View Dependent Claims (2, 3, 4, 5, 6)
-
Specification