Ink gestures

• US 20050229117A1
• Filed: 06/17/2005
• Published: 10/13/2005
• Est. Priority Date: 02/08/2002
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Gounares, Alexander, Hullender, Gregory
• Granted Patent: US 7,305,630 B2
• Time in Patent Office: Days
• US Class Current: 715/863
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

A system and process for capturing and implementing handwritten gestures is described. A user may use gestures to quickly command a pen-based input device to perform operations. Using the described embodiments, users may edit text or handwritten ink using a pen in a pen-based computing platform and have the edits affect the text or ink.

Claims

1. A method for processing strokes, comprising the steps of:

receiving one or more strokes using a stylus of a computing device;

rendering said one or more strokes as ink on a display of said computing device;

calculating Chebyshev polynomials for one or more coordinate points of said one or more strokes;

passing said polynomials to one or more Bayes nets, said Bayes nets corresponding to one or more predetermined command gestures; and

if the polynomials correspond to one or more of said Bayes nets, causing said computing device to execute one or more commands associated with said predetermined command gestures, and to delete said ink.

2. The method of claim 1, wherein said ink is in the form of textual characters.

3. The method of claim 1, wherein one or more of said Bayes nets corresponds to in-the-air command gestures made while a tip of said stylus is not touching said display.

4. The method of claim 3, wherein said in-the-air command gestures are made by varying an altitude of said stylus above said display.

5. The method of claim 4, wherein said gestures are made using a dedicated input portion of said display.

6. The method of claim 5, wherein said dedicated input portion of said display is temporary.

7. The method of claim 1, further comprising the step of normalizing data corresponding to said one or more strokes, and wherein said step of calculating Chebyshev polynomials uses said normalized data.

8. The method of claim 1, further including the step of dropping an earliest received stroke if a maximum number of non-corresponding strokes have been reached.

9. One or more computer-readable media storing computer-executable instructions for processing strokes using the following steps:

rendering one or more stylus strokes as ink on a display of a computing device;

calculating Chebyshev polynomials corresponding to said one or more strokes;

passing said Chebyshev polynomials to one or more Bayes nets corresponding to one or more command gestures;

if the polynomials correspond to one or more of said Bayes nets, causing said computing device to execute one or more commands associated with said command gestures, and to delete said ink; and

if the polynomials do not correspond to one or more of said Bayes nets, allowing the rendered ink to remain on the display.

10. The one or more computer-readable media of claim 9, wherein said ink is in the form of textual characters.

11. The one or more computer-readable media of claim 9, wherein one or more of said Bayes nets corresponds to in-the-air command gestures made while a tip of said stylus is not touching said display.

12. The one or more computer-readable media of claim 11, wherein said in-the-air command gestures are made by varying an altitude of said stylus above said display.

13. The one or more computer-readable media of claim 12, wherein said gestures are made using a dedicated input portion of said display.

14. The one or more computer-readable media of claim 13, wherein said dedicated input portion of said display is temporary.

15. The one or more computer-readable media of claim 9, further including instructions for normalizing data corresponding to said one or more strokes, and wherein said calculating Chebyshev polynomials uses said normalized data.

16. The one or more computer-readable media of claim 9, further including instructions for dropping an earliest received stroke if a maximum number of non-corresponding strokes have been reached.

17. The one or more computer-readable media of claim 9, further including instructions for using a positional relationship between a location of a received command gesture and a location of pre-existing ink rendered on the display before receiving the command gesture to identify a corresponding command.