System and method for identifying a user through an object held in a hand

• US 8,831,298 B2
• Filed: 06/20/2011
• Issued: 09/09/2014
• Est. Priority Date: 06/29/2010
• Status: Active Grant

• Current Assignee: Synamedia Limited
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Farkash, Eyal
• Primary Examiner(s): Mariam, Daniel
• Application Number:
  US13/805,576
• Publication Number:
  US 20130101185A1
• Time in Patent Office: 1,177 Days
• Field of Search: None
• US Class Current: 382/124
• CPC Class Codes: G06V 10/50 by performing operations within image blocks; by using histograms, e.g. histogram of oriented gradients [HoG]; by summing image-intensity values; Projection analysis
• CPC Class Codes: G06V 40/107 Static hand or arm
• CPC Class Codes: G06V 40/11 Hand-related biometrics; Hand pose recognition
• CPC Class Codes: G06V 40/12 Fingerprints or palmprints
• CPC Class Codes: G06V 40/1359 Extracting features related to ridge properties; Determining the fingerprint type, e.g. whorl or loop

Abstract

A system and method for identifying a user through an object held by a hand of the user, according to an image of the skin surface print of a portion of the hand of the user, which is optionally the skin surface print of at least a portion of the hand between the metacarpophalangeal joint and a distal interphalangeal joint of one or more fingers. Optionally, the image only includes the skin surface print of at least a portion of the hand between the metacarpophalangeal joint and a distal interphalangeal joint of one or more fingers. The method for identifying the user may also optionally only use selected portions of this image as described herein. Related apparatus and methods are also described.

Claims

1. A method for identifying a person holding an object with a hand, wherein the object comprises an image capture device and a transmitter, the method comprising:

providing a remote processing device comprising a receiver and a database, wherein the transmitter of the object and said receiver of said remote processing device are in communication and wherein said remote processing device and the object are physically separate;

capturing an image of at least a portion of the hand, said portion of the hand comprising at least a portion of the hand between a metacarpophalangeal joint and a distal interphalangeal joint of one or more fingers, said image featuring only a skin surface print;

sending said image with said transmitter to said receiver;

constructing a signature from data from said image by said remote processing device, said constructing said signature comprising converting said image to luminance levels to form a luminance matrix and converting said luminance matrix to form a vector through a lossy conversion process, wherein said signature comprises said vector, and said converting said luminance matrix to said vector comprises;

dividing said luminance matrix into a plurality of blocks each of N by N pixels, wherein N refers to a number of pixels in each row and in each column of each block of said luminance matrix; and

applying said lossy conversion process to at least some of said plurality of blocks, said lossy conversion process comprising a transform selected from the group consisting of a DCT (discrete cosine transform) transform, and a DFT (discrete Fourier transform), and also comprising applying a filter after applying said transform, said applying said filter comprising multiplying by a power vertical vector; and

searching through said database for a matching signature to said Signature obtained from said image to identify the person.

2. The method according to claim 1, wherein said image capture device comprises a camera and a light source.

3. The method according to claim 2, wherein said light source comprises an infra red diode.

4. The method according to claim 1, wherein said capturing said image comprises capturing an image of only a portion of the hand between a metacarpophalangeal joint and a distal interphalangeal joint of one or more fingers.

5. The method according to claim 1, wherein said applying said lossy conversion process comprises applying said lossy conversion process only to selected blocks of said plurality of blocks.

6. The method according to claim 5, wherein said applying said lossy conversion process only to selected blocks of said plurality of blocks is performed more than once, such that a vector is generated more than once for each captured image.

7. The method according to claim 6, wherein said applying said lossy conversion process only to selected blocks of said plurality of blocks is performed repeatedly from contiguous blocks from said image.

8. The method according to claim 1, further comprising providing a television receiver for receiving a television signal and a display device in communication with said television receiver, wherein said object is a viewer control for controlling said television receiver and said remote processing device is in communication with said television receiver, the method further comprising identifying the person according to said vector to form an identification of the person;

providing said identification to said television receiver by said remote processing device; and

adjusting at least one function of said television receiver according to said identification.

9. The method according to claim 8, wherein said television receiver comprises said remote processing device, such that said remote processing device is physically connected to or integrally formed with said television receiver.

10. The method according to claim 8, wherein said television receiver receives a television signal selected from the group consisting of a broadcast television signal, a unicast signal, a multicast signal, a signal transmitted over a cellular telephone network, a signal transmitted over a computer network, a signal transmitted by satellite and a signal transmitted by a cable television network.

11. The method according to claim 8, further comprising controlling access to said television signal according to said identification.

12. The method according to claim 11, wherein said controlling access further comprises purchasing access to said television signal according to said identification.

13. The method according to claim 11, wherein said controlling access further comprises applying one or more parental controls according to said identification.

14. The method according to claim 1, wherein said image comprises at least 160 pixels by 120 pixels.

15. The method according to claim 1, further comprising registering a new person to said database by capturing said image of said portion of the hand more than once to form a plurality of captured images;

converting said plurality of captured images to a plurality of vectors; and

storing said plurality of vectors in said database with at least one identifier of said new person.

16. The method according to claim 15, wherein said at least one identifier of said new person is a relative identifier to distinguish said vectors of said new person from vectors of one or more other persons in said database.

17. The method according to claim 16, wherein said at least one identifier of said new person is an absolute identifier selected from the group consisting of a PIN code, and a name.

18. A system for identifying a person, the person having a hand, the system comprising:

an object held by at least a portion of the hand of the person, wherein the object comprises an image capture device and a transmitter, wherein said image capture device captures an image of at least a portion of the hand, said image featuring only a skin surface print, said transmitter transmitting said image to a remote processing device external to said system, the remote processing device comprising a receiver and a database, wherein said transmitter of the object and said receiver of the remote processing device are in communication, such that said receiver receives said image from said transmitter, and wherein said remote processing device and the object are physically separate,

wherein said remote processing device constructs a signature from data from said image by;

converting said image to luminance levels to form a luminance matrix and converting said luminance matrix to form a vector through a lossy conversion process, wherein said signature comprises said vector, and said converting said luminance matrix to said vector comprises;

dividing said luminance matrix into a plurality of blocks each of N by N pixels, wherein N refers to a number of pixels in each row and in each column of each block of said luminance matrix; and

applying said lossy conversion process to at least some of said plurality of blocks, said lossy conversion process comprising a transform selected from the group consisting of a DCT (discrete cosine transform) transform, and a DFT (discrete Fourier transform), and also comprising applying a filter after applying said transform, said applying said filter comprising multiplying by a power vertical vector,

and wherein said remote processing device searches through said database for a matching signature to said signature obtained from said image to identify the person, and

wherein said image is of a portion of the hand up to but not including any fingertips, such that either said image capture device captures said image of a portion of the hand up to but not including any fingertips or alternatively, said transmitter transmits only an image of a portion of the hand up to but not including any fingertips.