Chinese character handwriting recognition system

• US 20040017946A1
• Filed: 07/25/2002
• Published: 01/29/2004
• Est. Priority Date: 07/25/2002
• Status: Active Grant

• Current Assignee: Tegic Communications, Inc. (Microsoft Corporation)
• Original Assignee: AOL LLC (Apollo Global Management, Inc.)
• Inventors: Longe, Michael R., Palmer, Brian
• Granted Patent: US 6,970,599 B2
• Time in Patent Office: Days
• US Class Current: 382/185
• CPC Class Codes: G06F 3/018 Input/output arrangements for oriental characters
• 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

Abstract

A handwritten Chinese character input method and system is provided to allow users to enter Chinese characters to a data processor by adding less than three strokes and one selection movement such as mouse clicking or stylus or finger tapping. The system is interactive, predictive, and intuitive to use. By adding one or two strokes which are used to start writing a Chinese character, or in some case even no strokes are needed, users can find a desired character from a list of characters. The list is context sensitive. It varies depending on the prior character entered. Compared to other existing systems, this system can save users considerable time and efforts to entering handwritten characters.

Claims

1. A Chinese character handwriting input system, comprising:

recognition means for recognizing a category of handwriting stroke from a predefined number of stroke categories;

collection means for organizing a list of characters that commonly start with one or more recognized categories of handwriting stroke, said list of characters being displayed in a predefined sequence; and

selection means for selecting a desired character from said list of characters.

2. The Chinese character handwriting input system of claim 1, wherein said predefined number of stroke categories comprises five basic categories, each having one or more sub-categories.

3. The Chinese character handwriting input system of claim 1, wherein said collection means displays a list of most frequently used characters when no strokes are entered or after a character is selected.

4. The Chinese character handwriting input system of claim 3, wherein said list of most frequently used characters is context sensitive, depending upon a last Chinese character entered.

5. The Chinese character handwriting input system of claim 1, wherein said predefined sequence is based on any of:

number of strokes necessary to write out a character;

use frequency of a character; and

contextual relation to the last character entered.

6. The Chinese character handwriting input system of claim 1, wherein said selection means is associated with any of:

mouse clicking;

stylus tapping;

finger tapping;

key pressing; and

button pressing.

7. The Chinese character handwriting input system of claim 1, further comprising:

means for displaying a numeric representation of each stroke that is entered and a full numeric representation of strokes for a Chinese character that is selected.

8. A method for inputting handwritten Chinese characters, comprising the steps of:

adding a stroke into a pattern recognition system;

categorizing said added stroke into one of a predefined number of stroke categories;

finding characters based on frequency of character use;

displaying a list of found characters;

if a desired character is in said list, selecting said desired character from said list;

if a desired character is not visible in said list, adding another stroke;

finding most common characters that appear after a previously selected character based on a present stroke sequence; and

displaying another list of found characters.

9. The method for inputting handwritten Chinese characters of claim 8, further comprising the steps of:

displaying a numeric representation for a stroke that is added; and

displaying full stroke numeric representation for a character that is selected.

10. The method for inputting Chinese handwriting characters of claim 8, further comprising the steps of:

displaying an iconic representation for a stroke that is added; and

displaying full stroke iconic representation for a character that is selected.

11. A storage medium for storing a program executed in a data recognition apparatus, the program comprising the steps of:

adding a stroke into a pattern recognition system;

categorizing said added stroke into one of a predefined number of stroke categories;

finding characters based on frequency of character use;

displaying a list of found characters;

if a desired character is in said list, selecting said desired character from said list;

if a desired character is not visible in said list, adding another stroke;

finding most common characters that appear after a previously selected character based on a present stroke sequence; and

displaying another list of found characters.

12. The storage medium for storing a program executed in a data recognition apparatus according to claim 11, wherein the program further comprises the steps of:

displaying a stroke number when a stroke is added; and

displaying full stroke numeric representation when a character is selected.

13. The storage medium for storing a program executed in a data recognition apparatus according to claim 11, wherein the program further comprises the steps of:

displaying a stroke icon when a stroke is added; and

displaying full stroke iconic representation when a character is selected.

14. A method for inputting handwritten Chinese characters, comprising the steps of:

adding a stroke into a pattern recognition system;

categorizing said added stroke into one of predefined number of stroke categories;

finding characters that commonly start with one or more recognized patterns of handwriting stroke;

displaying a list of found characters, said list of characters being displayed in a predefined sequence;

if a desired character is in said list, selecting said desired character from said list;

if a desired character is not visible in said list, adding another stroke;

finding most common characters that appear after a previously selected character based on a present stroke sequence; and

displaying another list of found characters.

15. The method for inputting handwritten Chinese characters of claim 14, further comprising the steps of:

displaying a numeric representation for a stroke that is added; and

displaying full stroke numeric representation for a character that is selected.

16. The method for inputting handwritten Chinese characters of claim 14, further comprising the steps of:

displaying an conic representation for a stroke that is added; and

displaying full stroke iconic representation for a character that is selected.

17. The method for inputting handwritten Chinese characters of claim 14, wherein said predetermined sequence is based on any of:

number of strokes necessary to write out a Chinese character;

use frequency of a Chinese character; and

contextual relation to the last Chinese character entered.

18. A storage medium for storing a program executed in a data recognition apparatus, the program comprising the steps of:

adding a stroke into a pattern recognition system;

categorizing said added stroke into one of a predefined number of stroke categories;

finding characters that commonly start with one or more recognized patterns of handwriting stroke;

displaying a list of found characters, said list of Chinese characters being displayed in a predefined sequence;

if a desired character is in said list, selecting said desired character from said list;

if a desired character is not visible in said list, adding another stroke;

finding most common characters that appear after a previously selected character based on a present stroke sequence; and

displaying another list of found characters.

19. The storage medium for storing a program executed in a data recognition apparatus according to claim 18, wherein the program further comprises the steps of:

displaying a numeric representation for a stroke that is added; and

displaying full stroke numeric representation for a character that is selected.

20. The storage medium for storing a program executed in a data recognition apparatus according to claim 18, wherein the program further comprises the steps of:

displaying an iconic representation for a stroke that is added; and

displaying full iconic representation for a character that is selected.

21. The storage medium for storing a program executed in a data recognition apparatus according to claim 18, wherein said predetermined sequence is based on any of:

number of strokes necessary to write out a character;

use frequency of a character; and

contextual relation to the last character entered.