Hologram methods for signature security, consolidated content, and an accelerometer

• US 7,738,150 B2
• Filed: 12/07/2005
• Issued: 06/15/2010
• Est. Priority Date: 12/07/2005
• Status: Expired due to Fees

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Gleghorn, Tyler Scott, Larsen, Glen C.
• Primary Examiner(s): Allen; Stephone B
• Assistant Examiner(s): Doak; Jennifer L.
• Application Number:
  US11/295,626
• Publication Number:
  US 20070127096A1
• Time in Patent Office: 1,651 Days
• Field of Search: 359/2, 359/900
• US Class Current: 359/2
• CPC Class Codes: G03H 1/00 Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
• CPC Class Codes: G03H 1/0005 Adaptation of holography to specific applications holographic optical element G02B5/32; holographic scanner G02B26/106; recognition using holographic mask G06V10/88; holographic memories G11B7/0065, G11C13/042
• CPC Class Codes: G03H 1/26 Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
• CPC Class Codes: G03H 1/265 Angle multiplexing; Multichannel holograms G03H1/268 takes precedence
• CPC Class Codes: G03H 2001/0033 in hologrammetry for measuring or analysing
• CPC Class Codes: G06K 19/06018 one-dimensional coding
• CPC Class Codes: G06K 2019/0629 Holographic, diffractive or retroreflective recording
• CPC Class Codes: Y10S 359/90 Methods

Abstract

Techniques for identifying encoded digital data in a multichannel hologram are described. A method can include steps of reading a first channel of a multichannel hologram, extracting first content data stored in the first channel, reading a second channel of the multichannel hologram, extracting second content data stored in the second channel, and utilizing the extracted content data. The extracted content data may be used for digital signature recognition. A system can include a multichannel hologram configured to store first, second, and third content data at first, second, and third channels respectively, at least one optical sensor configured to read the first, second, and third channels of the multichannel hologram and extract the first, second, and third content data, and a processor configured to measure an acceleration when the system is acted upon by a force.

Claims

1. A system for providing digital handwriting recognition, the system comprising:

a memory storage; and

a processing unit coupled to the memory storage, wherein the processing unit is configured to;

read a first channel of a multichannel hologram, the first channel comprising a first set of encoded patterns;

extract first content data stored in the first channel, the first content comprising a first read portion of the first set of encoded patterns and a first coordinate position within the first channel;

determine whether a relative angle between the multichannel hologram and an optical device has changed more than a threshold amount, the optical device comprising an electronic pen operative to read the multichannel hologram;

when the relative angle between the multichannel hologram and the optical device has changed more than the threshold amount, read at least one second channel of the multichannel hologram, the at least one second channel being determinable by an amount of change in the relative angle between the multichannel hologram and the optical device;

extract second content data stored in the at least one second channel, the second content data comprising a second read portion of a second set of encoded patterns stored in the at least one second channel and a second coordinate position within the second channel; and

determine an authentic digital handwriting based upon a comparison of the extracted first content data, the extracted second content data, and a known handwriting, the determination including a history of variations in the relative angle between the multichannel hologram and the optical device.

2. The system of claim 1, wherein the processing unit is further configured to calculate a first tilt angle of the optical device relative to the multichannel hologram based upon the extracted first content data.

3. The system of claim 2, wherein the processing unit is further configured to calculate a second tilt angle of the optical device relative to the multichannel hologram based upon the extracted second content data.

4. The system of claim 3, wherein the processing unit being configured to determine the authentic digital handwriting further comprises the processing unit being configured to determine the authentic digital handwriting based upon the calculated first tilt angle and the calculated second tilt angle.

5. The system of claim 1, wherein the processing unit is further configured to send the extracted first content data and the extracted second content data to a processor.

6. The system of claim 1, wherein the processing unit is further configured to record the authentic digital handwriting, wherein the first content data and the second content data correspond to a first angle and a second angle, respectively, of a field of view of the optical device relative to the multichannel hologram.

7. A method for providing digital handwriting recognition, the method comprising:

reading a first channel of a multichannel hologram, the first channel comprising a first set of encoded patterns;

extracting first content data stored in the first channel, the first content comprising a first read portion of the first set of encoded patterns and a first coordinate position within the first channel;

determining whether a relative angle between the multichannel hologram and an optical device has changed more than a threshold amount, the optical device comprising an electronic pen operative to read the multichannel hologram;

in response to determining that the relative angle between the multichannel hologram and the optical device has changed more than the threshold amount, reading at least one second channel of the multichannel hologram, the at least one second channel being determinable by an amount of change in the relative angle between the multichannel hologram and the optical device;

extracting second content data stored in the at least one second channel, the second content data comprising a second read portion of a second set of encoded patterns stored in the at least one second channel and a second coordinate position within the second channel; and

determining an authentic digital handwriting based upon a comparison of the extracted first content data, the extracted second content data, and a known handwriting, the determination including a history of variations in the relative angle between the multichannel hologram and the optical device.

8. The method of claim 7, further comprising calculating a first tilt angle of the optical device relative to the multichannel hologram based upon the extracted first content data.

9. The method of claim 8, further comprising calculating a second tilt angle of the optical device relative to the multichannel hologram based upon the extracted second content data.

10. The method of claim 9, wherein determining the authentic digital handwriting further comprises determining the authentic digital handwriting based upon the calculated first tilt angle and the calculated second tilt angle.

11. The method of claim 7, further comprising sending the extracted first content data and the extracted second content data to a processor.

12. The method of claim 7, further comprising recording the authentic digital handwriting, wherein the first content data and the second content data correspond to a first angle and a second angle, respectively, of a field of view of the optical device relative to the multichannel hologram.

13. A computer-readable storage medium that stores a set of instructions which when executed perform a method for providing digital handwriting recognition, the method executed by the set of instructions comprising:

reading a first channel of a multichannel hologram, the first channel comprising a first set of encoded patterns;

extracting first content data stored in the first channel, the first content comprising a first read portion of the first set of encoded patterns and a first coordinate position within the first channel;

determining whether a relative angle between the multichannel hologram and an optical device has changed more than a threshold amount, the optical device comprising an electronic pen operative to read the multichannel hologram;

in response to determining that the relative angle between the multichannel hologram and the optical device has changed more than the threshold amount, reading at least one second channel of the multichannel hologram, the at least one second channel being determinable by an amount of change in the relative angle between the multichannel hologram and the optical device;

extracting second content data stored in the at least one second channel, the second content data comprising a second read portion of a second set of encoded patterns stored in the at least one second channel and a second coordinate position within the second channel; and

determining an authentic digital handwriting based upon a comparison of the extracted first content data, the extracted second content data, and a known handwriting, the determination including a history of variations in the relative angle between the multichannel hologram and the optical device.

14. The computer-readable storage medium of claim 13, further comprising calculating a first tilt angle of the optical device relative to the multichannel hologram based upon the extracted first content data.

15. The computer-readable storage medium of claim 14, further comprising calculating a second tilt angle of the optical device relative to the multichannel hologram based upon the extracted second content data.

16. The computer-readable storage medium of claim 15, wherein determining the authentic digital handwriting further comprises determining the authentic digital handwriting based upon the calculated first tilt angle and the calculated second tilt angle.

17. The computer-readable storage medium of claim 13, further comprising sending the extracted first content data and the extracted second content data to a processor.

18. The computer-readable storage medium of claim 13, further comprising recording the authentic digital handwriting, wherein the first content data and the second content data correspond to a first angle and a second angle, respectively, of a field of view of the optical device relative to the multichannel hologram.