Method and system for data entry of handwritten symbols

• US 6,594,390 B2
• Filed: 07/17/2001
• Issued: 07/15/2003
• Est. Priority Date: 06/17/1991
• Status: Expired due to Fees

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Bishop, Bryon Dean, Frink, Lloyd
• Primary Examiner(s): Couso, Jose L.
• Application Number:
  US09/908,113
• Publication Number:
  US 20020027550A1
• Time in Patent Office: 728 Days
• Field of Search: 382/100, 382/187, 382/309, 178/18-20, 345/179-183
• US Class Current: 382/187
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text
• CPC Class Codes: G06V 30/1423 the instrument generating sequences of position coordinates corresponding to handwriting preprocessing or recognising digital ink G06V30/32
• CPC Class Codes: G06V 30/32 Digital ink

Abstract

A method and system for data entry of handwritten text into a computer program that is not designed to accept handwritten text is provided. In preferred embodiments, the computer program is designed to operate in a windowing environment. A data entry program receives handwritten data, recognizes the data, and sends the recognized data to the computer program. The computer program processes the recognized data as if it had been entered from the keyboard. According to the present invention, the data entry program overlaps the window of the computer program with an invisible window. To the user, it looks as if the computer program is accepting handwritten data directly.

Claims

1. A computer-implemented method, comprising:

receiving handwriting comprising pen input at a manager program;

converting the pen input into a key event; and

feeding the key event from the manager program to an application, the manager program separate from the application such that the application need not directly receive and process the handwriting.

2. The method of claim 1 wherein receiving handwriting includes detecting the end of the pen input prior to converting the pen input into a key event.

3. The method of claim 2 wherein detecting the end of the pen input includes detecting a pen up event.

4. The method of claim 2 wherein detecting the end of the pen input includes detecting that pen input has stopped for a period of time.

5. The method of claim 1 wherein feeding the key event from the manager program to a application comprises providing an event message to a storage location.

6. The method of claim 5 wherein the storage location corresponds to a window associated with the application.

7. The method of claim 5 wherein the application removes the event message from the storage location.

8. The method of claim 1 wherein the key event corresponds to a character.

9. The method of claim 1 wherein the pen input is received by the manager program.

10. The method of claim 1 wherein converting the pen input into a key event includes calling a recognizer.

11. A computer-readable medium having computer-executable instructions for performing the method of claim 1.

12. In a computing device having an application program, a system comprising:

a digitizer configured to receive handwritten input and provide handwriting event data corresponding to the handwritten input;

a manager program configured to process the handwriting event data, including;

1) providing the handwriting event data to a recognizer that converts handwriting event data to corresponding virtual event data;

2) receiving the virtual event data corresponding to the handwriting event data from the recognizer; and

3) making the virtual event data available to the application program, and

the manager program separate from the application program such that the application program need not directly provide the handwriting event data to the recognizer to have the virtual event data made available thereto.

13. The system of claim 12 wherein the virtual event data comprises at least one key event.

14. The system of claim 12 wherein the handwritten input is received at the digitizer and directed toward the application, and the manager program intercepts the corresponding handwriting event data provided by the digitizer.

15. In a computing device, a method comprising:

receiving pen events;

processing the pen events, including providing at least some of the pen events to a recognizer that converts the pen events to a key event; and

making the key event available to an executing application, wherein the processing of the pen events is performed external to the executing application such that the executing application has the key event made available thereto without the executing application directly providing the pen events to the recognizer.

16. The method of claim 15 wherein the pen events are provided by a digitizer that receives handwritten input.

17. The method of claim 15 wherein processing the pen events includes detecting a pen up event.

18. The method of claim 15 wherein the key event corresponds to a character, and wherein the application receives the key event and outputs a display of the character at a cursor location.

19. The method of claim 15 wherein the key event corresponds to a command, and wherein the application receives the key event and takes an action based on the command.

20. A computer-readable medium having computer-executable instructions for performing the method of claim 15.

21. In a computing device, a system comprising,

an executing application capable of receiving key events made available thereto;

a digitizer configured to receive pen input and provide pen events corresponding to the pen input; and

a manager program that processes the pen events, the processing including providing at least some of the pen events to a recognizer to convert the pen events to a key event which is then made available to the executing application, the manager program being separate from the executing application such that the executing application need not provide the pen events to the recognizer to obtain the key event.

22. The system of claim 21 wherein the manager program processes the pen events when the pen events are received at a particular area of the digitizer.

23. The system of claim 21 wherein the manager program provides the pen events to a recognizer on detection of a pen up event.

24. The system of claim 21 wherein the key event corresponds to a character.

25. The system of claim 24 wherein the application receives the key event and outputs a display of the character at a cursor location.

26. The system of claim 21 wherein the key event corresponds to a command.

27. The system of claim 26 wherein the application receives the key event and takes an action based pp the command.