Individual identification device

• US 8,190,239 B2
• Filed: 02/01/2005
• Issued: 05/29/2012
• Est. Priority Date: 09/03/2002
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Endoh, Toshio, Aoki, Takahiro, Goto, Makoto, Watanabe, Masaki
• Primary Examiner(s): Smith, Ruth S
• Application Number:
  US11/046,698
• Publication Number:
  US 20050148876A1
• Time in Patent Office: 2,674 Days
• Field of Search: 600/310, 600/473, 600/407, 600/475, 600/479, 356/51, 250/334, 250/339.11, 250/339.14, 382/115, 382/125
• US Class Current: 600/473
• CPC Class Codes: A61B 5/1171 based on the shapes or appearances of their bodies or parts thereof
• CPC Class Codes: G06V 40/10 Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
• CPC Class Codes: G06V 40/14 Vascular patterns
• CPC Class Codes: G06V 40/145 Sensors therefor

Abstract

In order to provide an individual identification device for enabling good blood-vessel imaging even in a noncontact way and using an identifying method suitable for noncontact imaging, the device comprises an imaging device for imaging blood vessels of a hand of the user in a noncontact way including a position/direction/shape instructing unit for instructing the user to hold up his hand, one or more irradiating units for irradiating the hand with near infrared radiation, and one or more imaging units for producing an image by near infrared radiation; a blood-vessel image extracting unit for extracting the blood-vessel image from the produced image; a blood-vessel image storage unit for storing the hand blood-vessel image of each user; and an identifying unit for identifying the user by comparing the extracted blood-vessel image with the registered blood-vessel image.

Claims

1. An individual identification device which uses an image of blood vessels of a hand to perform individual identification, comprising:

an imaging device which can image blood vessels of a hand, comprising;

a position/direction/shape instructing unit instructing a user to hold up his hand;

one or more irradiating units irradiating the hand with near infrared radiation; and

an imaging unit producing an image of the hand by the near infrared radiation responsive to reflection, by the hand, of the near infrared radiation irradiated by the one or more irradiating units; and

a computer comprising;

a processor;

a storage device;

the processor executes a process including;

producing an image of the hand using the imaging device;

extracting a blood-vessel image from the produced image of the hand;

storing a registered hand blood-vessel image to the storage device;

calculating a three-dimensional shape of the hand according to a position and/or direction of the hand from the produced image of the hand as a calculation result;

correcting and outputting a corrected extracted blood-vessel image according to the calculation result when a correction not larger or equal to a specified amount is to be made and not outputting a corrected extracted blood-vessel image when a correction larger than the specified amount is to be made, and notifying the user of a correction result when the corrected extracted blood-vessel image is outputted; and

identifying the user by comparing the extracted blood-vessel image with the registered blood-vessel image when the corrected extracted blood-vessel image is not outputted and by comparing the corrected extracted blood-vessel image with the registered blood-vessel image when the corrected extracted blood-vessel image is outputted.

2. The individual identification device according to claim 1, wherein the imaging device comprises a plate which makes near infrared radiation transmit on a plane toward which the user holds up his hand, the plate sticking on the imaging device to reinforce a strength of the imaging device.

3. The individual identification device according to claim 1, wherein the imaging device is mounted on a mounting stand which can adjust a plane toward which the user holds up his hand to any arbitrary angle.

4. The individual identification device according to claim 1, wherein the position/direction/shape instructing unit comprises a hand print placed on a plane sheet toward which the user holds up his hand.

5. The individual identification device according to claim 1, wherein

the imaging device comprises a plurality of imaging units;

and

the blood-vessel image extraction unit extracts a blood-vessel image from a combined image of the images produced by the plurality of imaging units.

6. The individual identification device according to claim 1, wherein the position/direction/shape instructing unit comprises a transparent plate or a half mirror toward which the user holds up his hand which is installed in front of the imaging device.

7. The individual identification device according to claim 1, wherein the imaging device is housed in a hole of the individual identification device.

8. The individual identification device according to claim 1, wherein the imaging device is housed along a groove provided in the individual identification device.

9. The individual identification device according to claim 1, wherein the imaging device is equipped with a split-curtain shaped intercepting plate which intercepts external light from the imaging unit when the user holds up his hand.

10. The individual identification device according to claim 1, wherein

the process further including:

controlling the radiation of near infrared radiation by the irradiating units according to an incoming of external light other than near infrared radiation into the imaging unit.

11. The individual identification device according to claim 1, said position/direction/shape instructing unit further comprising a unit in which a plane toward which the user holds up the hand is flat and indicates a proper position and direction of the hand by means of a figure.

12. The individual identification device according to claim 1, wherein

the process further including:

detecting a position and/or direction of a hand from an image of the hand each time a blood-vessel image is extracted, and

correcting the extracted blood-vessel image according to the detected position and/or direction of the hand and giving the corrected image the computer when the corrected image is appropriate, and when the corrected image is in appropriate, making the position/direction/shape instructing unit notifies the user to that effect.

13. The individual identification device according to claim 1, wherein:

the process further including;

detecting the position and/or direction of a hand from the image of the hand each time a blood-vessel image is detected;

judging whether the detected position and/or direction of the hand is appropriate; and

notifying the user that the position and/or the direction of the hand is inappropriate when the position and/or the direction of the hand is inappropriate.

14. The individual identification device according to claim 1, wherein:

the process further including;

judging whether a hand is held up on a plane on which the user should hold up his hand; and

identifying an individual when the hand is judged to be held up on said plane.

15. The individual identification device according to claim 1, wherein the imaging device comprises a plurality of imaging units, and the plurality of imaging units image a plurality of parts of a hand at the same time.

16. The individual identification device according to claim 1, wherein the imaging unit images a plurality of parts of a hand in order.

17. The individual identification device according to claim 1, wherein the position/direction/shape instructing unit instructs the user to locate the hand at a variable distance from the imaging device.

18. The individual identification device according to claim 1, wherein the position/direction/shape instructing unit instructs the user to locate the hand at a variable position relative to the imaging device.

19. The individual identification device according to claim 1, wherein

the process further including:

correcting the extracted blood-vessel image responsive to radiation intensity; and

identifying the user by comparing the corrected extracted blood-vessel image with the registered blood-vessel image.

20. An individual identification device, wherein the device performs individual identification by detecting an image of blood vessels of a hand, comprising:

an imaging device which can image blood vessels of a hand in various positions including a distance and a direction of a palm of the hand in a noncontact way, and which has one or more irradiating units irradiating the hand with near infrared radiation, and imaging unit producing an image based on near infrared radiation reflected from the hand; and

a computer comprising;

a processor;

a storage device;

the processor executes a process including;

producing image of the hand using the imaging device;

extracting a blood-vessel image from the produced image;

storing a registered blood-vessel image to the storage device;

calculating a three-dimensional shape of the hand from the produced image of the hand according to a position and/or direction of the hand and producing a calculation result;

correcting a plane upon which the hand is assumed to lie and correcting the extracted blood vessel image according to the calculation result and outputting a corrected extracted blood-vessel image and notifying a user of the correcting when a correction result is not larger than a specified amount; and

comparing the registered blood-vessel image with the extracted blood-vessel image when the corrected extracted blood-vessel image is not outputted and comparing the registered blood-vessel image with the corrected extracted blood-vessel image when the corrected extracted blood-vessel image is outputted to perform individual identification.

21. A non-transitory computer readable portable type storage medium which is used by a computer which performs individual identification by detecting an image of blood vessels of a hand stores a program which directs the computer to execute:

instructing the user how to hold his hand;

receiving an image of the user'"'"'s hand which includes a blood-vessel image produced by reflection of near infrared radiation from the hand;

extracting the user'"'"'s hand blood-vessel image;

detecting the position and/or direction of the hand;

correcting the blood-vessel image according to the detected position and/or direction of the hand, outputting a corrected blood vessel image and notifying the user of the correcting and not correcting when a correction larger than a specified amount is to be made;

comparing a registered blood-vessel image with the corrected blood-vessel image when the corrected blood vessel image is output and comparing the registered blood-vessel image with the extracted user'"'"'s hand blood-vessel image when the corrected blood vessel image is not output to perform individual identification.

22. An individual identification device which uses an image of blood vessels of a hand to perform individual identification, comprising:

an imaging device which can image blood vessels of a hand, comprising;

position/direction/shape instructing means for instructing a user to hold up his hand;

one or more irradiating means for irradiating the hand with near infrared radiation; and

imaging means for producing an image by reflection of the near infrared radiation from the hand;

a computer comprising;

processor means;

storage means for storing;

the processor means for executing a process including;

producing image of the hand using the imaging device;

extracting a blood-vessel image from the produced image;

storing the registered hand blood-vessel image of each user to the storage means; and

identifying the user by comparing the extracted blood-vessel image with the registered blood-vessel image.

23. An individual identification device, wherein the device performs individual identification by detecting an image of blood vessels of a hand, comprising:

a compact and portable pen shaped imaging device which can image blood vessels of a hand by holding the compact and portable pen type imaging device, and which has one or more irradiating units irradiating the hand with near infrared radiation, and one or more imaging units for producing an image based on reflection of near infrared radiation from the hand; and

a computer comprising;

a processor;

a storage medium;

the processor executes a process including;

producing image of the hand using the imaging device;

extracting a blood-vessel image from the produced image of the hand;

storing a registered blood-vessel image of a user to the storage device;

calculating a three-dimensional shape of the hand from the produced image of the hand and the position and/or direction of the hand;

correcting a position of the hand based on a mean position of pixels of the hand according to the three-dimensional shape of the hand and outputting a corrected extracted blood-vessel image when a correction is not larger than a specified amount and not outputting when a correction is larger than the specified amount; and

comparing the registered blood-vessel image with the extracted blood-vessel image when the corrected extracted blood-vessel image is not outputted and comparing the registered blood-vessel image with the corrected extracted blood-vessel image when the corrected extracted blood-vessel image is outputted to perform individual identification.