Personal authentication device
2 Assignments
0 Petitions
Accused Products
Abstract
A compact authentication device that prevents user from feeling pressure and is strong against external light, when capturing an image of a finger blood vessel pattern with transmitted light. The device includes a guidance part for determining the finger position, a light source disposed on at least one side of the guidance part to emit light to be transmitted though the finger, an image capture part for capturing the transmitted light, a shading unit for limiting an irradiation region of the light, a finger thickness measuring unit, a unit for controlling a light amount of the light source based on a result of the measurement, a unit for recording registered image patterns of the finger, a unit for collating a captured image pattern from the image capture part with the registered patterns, and a unit for controlling different processing according to the collation result.
-
Citations
38 Claims
-
1-19. -19. (canceled)
-
20. A personal identification apparatus comprising:
-
a light source to irradiate light to a finger from a side of the finger; an opening part to pass light transmitted through the finger from the light source; an image capture unit to capture light transmitted through the opening part, the image capture unit being positioned on an opposite side of the finger with respect to the opening part; and a shading part to limit irradiation of the light from the light source, wherein a vein pattern of the finger is extracted from a transmitted light image of the finger thus captured. - View Dependent Claims (21, 23, 24, 25, 27, 28, 29, 30, 31, 32)
-
-
22. A personal identification apparatus comprising:
-
an installation surface on which a finger is placed; a light source to irradiate light laterally to the finger thus placed; an image capture unit to capture light transmitted through the finger from the light source, the image capture unit being disposed below the finger when an installation surface side of the finger thus placed is defined as “
below the finger”
; anda shading part to limit irradiation of the light to an image capture unit side of the finger, wherein a vein pattern of the finger is extracted from a transmitted light image of the finger thus captured.
-
-
26. A personal identification apparatus comprising:
-
two light sources to irradiate a finger in right and left directions, respectively; an opening part to pass light transmitted through the finger form the light source; an image capture unit to capture light transmitted through the opening part, the image capture unit being positioned on an opposite side of the finger with respect to the opening part; and a shading part to limit irradiation of light to the opening part, the shading part being disposed between the light sources and the image capture unit and between the light sources and the finger, wherein a vein pattern of the finger for personal identification is extracted from a transmitted light image of the finger thus captured.
-
-
33. A personal identification method comprising the steps of:
-
irradiating light to a placed finger from a side of the finger; capturing light irradiated to the finger and transmitted through an opening part on an opposite side of the finger with respect to the opening part; and extracting a vein pattern of the finger from a transmitted light image of the finger thus captured, wherein irradiation of the light from the side of the finger is limited. - View Dependent Claims (34, 36, 37, 38)
-
-
35. A personal identification method comprising the steps of:
-
irradiating light laterally to a finger placed on an installation surface; capturing light transmitted through the finger from below the finger when an installation surface side of the finger thus placed is defined as “
below the finger”
; andextracting a vein pattern of the finger from a transmitted light image of the finger thus captured, wherein irradiation of the light to an image capture side of the finger is limited.
-
Specification