Method and device for handwriting detection

• US 8,165,398 B2
• Filed: 05/30/2008
• Issued: 04/24/2012
• Est. Priority Date: 05/30/2008
• Status: Expired due to Fees

• Current Assignee: Sony Ericsson Mobile Communications USA Incorporated (Sony Group Corp.)
• Original Assignee: Sony Ericsson Mobile Communications USA Incorporated (Sony Group Corp.)
• Inventors: De Haan, Ido Gert
• Primary Examiner(s): Mehta, Bhavesh
• Assistant Examiner(s): SHAH, UTPAL D
• Application Number:
  US12/129,740
• Publication Number:
  US 20090297028A1
• Time in Patent Office: 1,425 Days
• Field of Search: 382/186, 382/187, 382/188, 382/314
• US Class Current: 382/186
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06V 30/1423 the instrument generating sequences of position coordinates corresponding to handwriting preprocessing or recognising digital ink G06V30/32

Abstract

The invention relates to a method for handwriting detection using a handwriting tool (2) being arranged for communicating with a further device (2) and comprising the following steps: recognizing characters using detection of movements carried out by means of said handwriting tool (2); determining the probability factor of at least one input character corresponding to a given character; and using said probability factor in a step for correction, completion and prediction of words being formed by said characters. The invention also relates to a device for such handwriting detection.

Claims

1. A method for handwriting detection using headset wirelessly connected to a mobile phone, wherein a user performs writing movements with the headset to represent characters for text entry into the mobile phone, the method comprising:

performing character recognition on the movement of the headset to determine a list of characters possibly represented by the headset movement, the list of characters containing at least one character;

determining a probability factor for each character in the list of characters, wherein the probability factor represents the probability that the respective character in the list of characters corresponds to the movement of the headset; and

predicting words formed by the writing movements based on the probability factors of the character in the list of characters, wherein the predicted words may comprise a greater number of symbols or different symbols than the at least one character.

2. A method according to claim 1, wherein the headset comprises at least one accelerometer, and the headset movement is detected by the accelerometer.

3. A method according to claim 1, wherein the predicting words is performed according to a T9/XT9 method.

4. The method according to claim 1, wherein the predicted words are inputted as text into the mobile phone.

5. A device for handwriting detection comprising a headset wirelessly connected to a mobile phone, the headset comprising:

a motion sensor, wherein the motion sensor detects movement of the headset;

the mobile phone comprising;

a character recognition unit, wherein the character recognition unit determines a probability factor of at least one character corresponding to movement of the headset; and

a word predicting unit, wherein the word predicting unit predicts words formed by the at least one character based on the probability factor of the at least one character and the predicted words may comprise a greater number of symbols or different symbols than the at least one character.

6. The device according to claim 5, wherein the motion sensor comprises at least one accelerometer.

7. The device according to claim 5, wherein the word predicting unit is configured to perform a T9/XT9 method.

8. The device according to claim 5, wherein the predicted words are inputted as text into the mobile phone.