Personal identification device and method
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.
-
Citations
47 Claims
-
1-27. -27. (canceled)
-
28. A blood vessel pattern extraction apparatus, comprising:
-
a light source;
a camera which captures light transmitted through a set finger to generate an image; and
an image processing unit which extracts a blood vessel pattern from the image captured by the camera for personal identification, wherein the image processing unit extracts a finger outline, determines an approximated straight line of the finger outline, and rotationally corrects the image so that the approximated straight line of the finger outline is horizontal to an edge of the image. - View Dependent Claims (29, 30, 31, 33, 35, 37, 39)
-
-
32. A blood vessel pattern extraction apparatus comprising:
-
a light source;
a camera which captures light transmitted through a set finger to generate an image; and
an image processing unit which extracts a blood vessel pattern from the image captured by the camera for personal identification, wherein the image processing unit sets a tracking point at a center of the image, detects pixels having greatest difference intensity values as boundary pixels by shifting the tracking point in both directions parallel to the edge of the image in a direction of a finger width, and tracks a finger outline from the boundary pixels to extract the finger outline. - View Dependent Claims (34, 36, 38, 40)
-
-
41. A personal identification apparatus, comprising:
-
a light source;
a camera which captures light transmitted through a set finger; and
an image processing unit which executes personal identification by comparing an extracted blood vessel pattern with a registered pattern, wherein the image processing unit extracts a finger outline, determines an approximated straight line of the finger outline, rotationally corrects the image so that the approximated straight line of the finger outline is horizontal to an edge of the image, and extracts the blood vessel pattern from the corrected image. - View Dependent Claims (42, 43, 44, 45, 46, 47)
-
Specification