System and method of encoding content and an image

• US 9,741,085 B2
• Filed: 03/14/2013
• Issued: 08/22/2017
• Est. Priority Date: 03/14/2013
• Status: Expired due to Fees

• Current Assignee: Artificial Intelligence Research Group Limited
• Original Assignee: Artificial Intelligence Research Group Limited
• Inventors: Avni, Yossi, Suchard, Eytan
• Primary Examiner(s): Bella, Matthew
• Assistant Examiner(s): Torres, Jose M
• Application Number:
  US13/831,102
• Publication Number:
  US 20140281945A1
• Time in Patent Office: 1,622 Days
• Field of Search: None
• CPC Class Codes: G06F 21/32 using biometric data, e.g. fingerprints, iris scans or voiceprints
• CPC Class Codes: G06F 3/017 Gesture based interaction, e.g. based on a set of recognized hand gestures interaction based on gestures traced on a digitiser G06F3/04883
• CPC Class Codes: G06T 1/0021 Image watermarking
• CPC Class Codes: G06T 1/0028 Adaptive watermarking, e.g. Human Visual System [HVS]-based watermarking
• CPC Class Codes: G06V 40/376 Acquisition
• CPC Class Codes: G06V 40/388 Sampling; Contour coding; Stroke extraction
• CPC Class Codes: H04L 63/12 Applying verification of the received information cryptographic mechanisms or cryptographic arrangements for data integrity or data verification H04L9/32

Abstract

A method of encoding content data into a digital image includes determining bit values of a pixel within the digital image, and modifying the bit values within the pixel based on content data to be encoded in order to encode the content data into the digital image. The step of determining the bit values of a pixel within the digital image includes determining a binary representation of the bit values of the pixel. The step of modifying the bit values includes determining a binary representation of the content data to be encoded within the pixel and encoding the content data using a reversible binary operation.

Claims

1. A method of encoding user data within a signature field of an electronic document comprising:

receiving, with one or more processors, user data captured as a user enters a signature gesture, the user data comprising a plurality of sample points, each sample Point comprising position data and temporal data;

verifying the signature gesture entered by the user by comparing behaviometric information derived from said user data, and comparing this information with pre-stored behaviometric templates to determine the identity of the user and determining a verification result;

generating, with the one or more processors, a digital image for incorporation into the signature field of the electronic document, the digital image comprising a plurality of pixels, each pixel comprising a first byte value representing a red component, a second byte value representing a blue component, and a third byte value representing a green component;

encoding, with the one or more processors, the user data within one or more pixels of the digital image by performing a reversible binary operation with a first operand that includes a binary representation of a selected portion of the user data and with a second operand that includes one or more bytes selected from the red component, the blue component, or the green component of one or more pixels of the digital image;

encoding, with the one or more processors, the verification result within one or more pixels of the digital image; and

inserting with the one or more processors, the digital image within the signature field of the electronic document.

2. The method of claim 1, wherein the signature gesture entered by the user is a signature gesture entered into a computing device via an input device.

3. The method of claim 1, wherein the signature gesture is sampled as it is entered into the computing device in order to produce user data.

4. The method of claim 1, wherein the signature gesture is entered via a touch interface and the user data comprises touch position data.

5. The method of claim 4, wherein the user data further comprises lift data representing when the user is not in contact with the touch interface during signature capture.

6. The method of claim 1, wherein the signature gesture is entered via a motion sensing device.

7. The method of claim 1, wherein the user data comprises three dimensional position data.

8. The method of claim 1, wherein the digital image comprises a background portion.

9. The method of claim 8, wherein the background portion comprises a unique color associated with the user.

10. The method of claim 9, wherein the unique color is stored in a user profile.

11. The method of claim 8, wherein the user data is encoded into pixels forming the background portion of the signature field.

12. The method of claim 1, further comprising generating a representation of the entered signature gesture from the captured user data wherein the representation of the captured signature gesture comprises a trace line reproduction of the signature gesture entered by the user.

13. The method of claim 12, wherein the user data is encoded into pixels forming the trace line reproduction of the signature.

14. The method of claim 12, wherein the trace line reproduction comprises a unique color associated with the user.

15. A computing device for encoding user data within a signature field of an electronic document, the computing device comprising:

a touch-sensitive screen for receiving user data captured as a user enters a signature gesture, wherein the user data comprises a plurality of sample points, each sample point comprising position data and temporal data and having an associated bit value; and

one or more processors in communication with the touch-sensitive screen, the one or more processors being configured to;

verify the signature gesture entered by the user by comparing behaviometric information derived from said user data, and comparing this information with pre-stored behaviometric templates to determine the identity of the user and determine a verification result;

generate a digital image for incorporation into the signature field of the electronic document, the digital image comprising a plurality of pixels, each pixel within the digital image being expressed as a Red-Green-Blue (“

RGB”

) triplet of color components, each color component having an associated bit value;

encode the user data within pixels of the digital image by performing a reversible binary operation with a first binary value on a second binary value, the first binary value being a bit value from a selected sample point of the plurality of sample points and the second binary value being a bit value selected from a color component of a pixel selected from the plurality of pixels of the digital image;

encode, with the one or more processors, the verification result within one or more pixels of the digital image; and

insert the digital image within the signature field of the electronic document.

16. A server for encoding user data within a signature field of an electronic document comprising:

a touch-sensitive screen for receiving user data captured as a user enters a signature gesture, the user data comprising a plurality of sample points, each sample point comprising position data and temporal data; and

one or more processors in communication with the touch-sensitive screen, the one or more processors being configured to;

generate a digital image for incorporation into the signature field of the electronic document, the digital image comprising a plurality of pixels, each pixel within the digital image being expressed as a Red-Green-Blue (“

RGB”

) triplet of color components, each color component having an associated bit value;

verify the signature gesture entered by the user by comparing behaviometric information derived from said user data, and comparing this information with pre-stored behaviometric templates to determine the identity of the user and determine a verification result;

encode the user data within pixels of the digital image by performing a reversible binary operation with a first binary value on a second binary value, the first binary value being a bit value from a selected sample point of the plurality of sample points and the second binary value being a bit value selected from a color component of a pixel selected from the plurality of pixels of the digital image;

encode, with the one or more processors, the verification result within one or more pixels of the digital image; and

an output for outputting the digital image having the user data encoded therein.

17. The server device of claim 16, wherein the output is arranged to send the digital image encoded with user data to a further computing device for insertion with the signature field of an electronic document.

18. The server device of claim 16, further comprising an insertion module for inserting the digital image within the signature field of the electronic document.

19. A method of encoding user data within a digital image comprising:

receiving user data that has been captured as a user performs a verification action, the user data comprising a plurality of sample points, each sample point comprising position data and temporal data;

verifying the verification action entered by the user by comparing behaviometric information derived from said user data, and comparing this information with pre-stored behaviometric templates to determine the identity of the user and determine a verification result; and

encoding the user data within pixels of a digital image, wherein;

each pixel within the digital image is expressed as one or more color components, each color component having an associated bit value,

the user data is encoded within the pixels of the digital image by performing a reversible binary operation with a first binary value on a second binary value, the first binary value being a bit value from a selected sample point of the plurality of sample points and the second binary value being a bit value selected from a color component of a pixel selected from the plurality of pixels of the digital image, and

the verification result is encoded within the pixels of the digital image.

20. The method of claim 19, further comprising outputting the digital image with encoded user data for use as a verification stamp.

21. The method of claim 19 wherein at least some of the image comprises encoded user data captured during a user verification action.

22. A computing device for encoding user data within digital image, the computing device comprising:

an input for receiving user data captured as a user performs a verification action, the user data comprising a plurality of sample points, each sample point comprising position data and temporal data;

one or more processors for verifying the verification action entered by the user by comparing behaviometric information derived from said user data and comparing this information with pre-stored behaviometric templates to determine the identity of the user and determine a verification result; and

an encoder for encoding the user data and the verification result within pixels of the digital image, wherein;

each pixel within the digital image is expressed as one or more color components, each color component having an associated bit value; and

the user data is encoded within the pixels of the digital image by performing a reversible binary operation with a first binary value on a second binary value, the first binary value being a bit value from a selected sample point of the plurality of sample points and the second binary value being a bit value selected from a color component of a pixel selected from the plurality of pixels of the digital image.

23. An apparatus for encoding a human signature, comprising:

a non-transitory, computer-readable memory having computer readable instructions; and

one or more processors that, having executed the computer readable instructions, are configured to;

receive a handwritten signature, the handwritten signature having one or more user data components, each component comprising position data and temporal data;

verify the handwritten signature entered by the user by comparing behaviometric information derived from said data components, and comparing this information with pre-stored behaviometric templates to determine the identity of the user and determining a verification result;

associate the handwritten signature and the verification result with a digital image having a plurality of pixels, each of the pixels being represented as a combination of three color components; and

encode the handwritten signature by using a reversible binary operation that uses a binary representation of selected bits of a given color component of a given pixel as a first operand and a binary representation of selected bits of the one or more user data components of the handwritten signature as a second operand.

24. The apparatus of claim 23, wherein the one or more user data components comprise gestures the user makes in making the handwritten signature.

25. The apparatus of claim 23, wherein the one or more processors associate the handwritten signature with the digital image by selecting a graphic image and placing the graphic image adjacent the received handwritten signature.

26. The apparatus of claim 23, wherein the one or more processors encode the handwritten signature to produce a unique color pattern based on the contours of the handwritten signature and selected color components for one or more pixels.

27. The apparatus of claim 23, wherein the apparatus comprises a server.

28. The apparatus of claim 23, wherein the apparatus comprises a computing device selected from the group consisting of a desktop computer, a laptop computer, a tablet and a mobile phone.

29. The apparatus of claim 23, wherein the one or more processors are further programmed to transmit the encoded handwritten signature to another apparatus.