Digital Drawing Using A Touch-Sensitive Device To Detect A Position And Force For An Input Event

• US 20140210798A1
• Filed: 01/31/2013
• Published: 07/31/2014
• Est. Priority Date: 01/31/2013
• Status: Abandoned Application

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: WILSON, Evan J.
• Application Number:
  US13/755,906
• Publication Number:
  US 20140210798A1
• Time in Patent Office: Days
• US Class Current: 345/179
• CPC Class Codes: G06F 21/32 using biometric data, e.g. fingerprints, iris scans or voiceprints
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

An example system includes a touch-sensitive device to detect a position and a force for an input event and generate input data indicative of the position and the force and a processor coupled to the touch-sensitive device. The processor receives the input data and generates digital ink data having a position based on the input data indicative of the position and having a digital ink characteristic based on the input data indicative of the force when the force for the input event is above a predetermined threshold. The processor also alters the position of a drawing cursor in response to a change in the position of the input event.

Claims

1. A system for digital drawing, comprising:

a touch-sensitive device to detect a position and a force for an input event and generate input data indicative of the position and the force; and

a processor coupled to the touch-sensitive device to;

receive the input data and generate digital ink data having a position based on the input data indicative of the position and having a digital ink characteristic based on the input data indicative of the force when the force of the input event is above a predetermined threshold; and

alter the position of a drawing cursor in response to a change in the position of the input event.

2. The system of claim 1 wherein the digital ink characteristic comprises thickness and the digital ink data indicates a greater thickness in response to a greater force and a lesser thickness in response to a lesser force.

3. The system of claim 1 wherein the processor causes a display to display digital ink on a drawing canvas, the position and digital ink characteristic of the digital ink is based on the position and digital ink characteristic indicated by the digital ink data.

4. The system of claim 1 wherein digital ink data further indicates at least one of a color and texture.

5. The system of claim 1 further comprising a handwriting recognition engine to authenticate a user'"'"'s handwriting based on the position and force of one or more input events.

6. The system of claim 5 wherein the handwriting recognition engine enables signing of a digital document if the user'"'"'s handwriting is authenticated and does not enable signing of a digital document if the user'"'"'s handwriting is not authenticated.

7. The system of claim 5 wherein the handwriting recognition engine enables access to a restricted program executing on the processor if the user'"'"'s handwriting is authenticated and does not enable access to the restricted program if the user'"'"'s handwriting is not authenticated.

8. A method for digital drawing, comprising:

detecting, by a touch-sensitive device, a position and a force for an input event;

generating input data indicative of the position and the force;

generating digital ink data having a position based on the input data indicative of the position and having a digital ink characteristic based on the input data indicative of the force when the force for the input event is above a predetermined threshold; and

altering the position of a drawing cursor in response to a change in the position of the input event.

9. The method of claim 8 wherein the digital ink characteristic comprises thickness and the digital ink data indicates a greater thickness in response to a greater force and a lesser thickness in response to a lesser force.

10. The method of claim 8 further comprising displaying digital ink on a drawing canvas, the position and digital ink characteristic of the digital ink is based on the position and digital ink characteristic indicated by the digital ink data.

11. The method of claim 8 wherein digital ink data further indicates one of a color and texture.

12. The method of claim 8 further comprising authenticating a user'"'"'s handwriting based on the position and force of one or more input events.

13. The method of claim 12 further comprising adding a digital signature to a digital document if the user'"'"'s handwriting is authenticated and not adding a digital signature to a digital document if the user'"'"'s handwriting is not authenticated.

14. The method of claim 12 further comprising enabling access to a restricted program executing on the processor if the user'"'"'s handwriting is authenticated and not enabling access to the restricted program if the user'"'"'s handwriting is not authenticated.

15. A non-transitory computer readable storage device containing instructions that, when executed by a processor, cause the processor to:

receive input data indicative of a position and a force of an input event detected by a touch-sensitive device;

generate digital ink data having a position based on the input data indicative of the position and having a digital ink characteristic based on the input data indicative of the force when the force for the input event is above a predetermined threshold; and

alter the position of a drawing cursor in response to a change in the position of the input event.

16. The non-transitory computer readable storage device of claim 15 wherein the digital ink characteristic comprises thickness and the digital ink data indicates a greater thickness in response to a greater force and a lesser thickness in response to a lesser force.

17. The non-transitory computer readable storage device of claim 15 wherein the instructions, when executed by the processor, further cause the processor to cause a display to display digital ink on a drawing canvas, the position and digital ink characteristic of the digital ink is based on the position and digital ink characteristic indicated by the digital ink data.

18. The non-transitory computer readable storage device of claim 15 wherein digital ink data further indicates one of a color and texture.

19. The non-transitory computer readable storage device of claim 15 wherein the instructions, when executed by the processor, further cause the processor to authenticate a user'"'"'s handwriting based on the position and force of one or more input events.

20. The non-transitory computer readable storage device of claim 19 wherein the instructions, when executed by the processor, further cause the processor to add a digital signature to a digital document if the user'"'"'s handwriting is authenticated and not add a digital signature to a digital document if the user'"'"'s handwriting is not authenticated.