Method and apparatus for displaying a handwritten message based on position and time data

• US 7,120,320 B2
• Filed: 09/23/2002
• Issued: 10/10/2006
• Est. Priority Date: 09/21/2001
• Status: Active Grant

• Current Assignee: Anoto Group AB
• Original Assignee: Anoto Group AB
• Inventors: Craven-Bartle, Thomas, Petterson, Lars, Hollstr⊙m, Magnus
• Primary Examiner(s): Mancuso, Joseph
• Assistant Examiner(s): KUHN, JORDAN M
• Application Number:
  US10/251,804
• Publication Number:
  US 20030072490A1
• Time in Patent Office: 1,478 Days
• Field of Search: 382/186, 382/314
• US Class Current: 382/314
• 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 method and an arrangement for presentation of a graphical representation of a handwritten message on a graphical screen. Position data and time data are recorded, indicating positions and points of time for the handwritten message. An image area in the graphical representation of the handwritten message is identified based on said position data and said time data, the size of the image area being a subportion of the graphical representation of the handwritten message. Finally, display data is provided to a screen, which display data comprises a graphical representation of the subportion of the handwritten message in the identified image area.

Claims

1. A method for presentation of a graphical representation of a handwritten message on a screen, comprising:

receiving position data which indicates positions for the handwritten message wherein the position data graphically represents the handwritten message,

receiving time data, which for each position of the handwritten message indicates a point of time for the creation of the handwritten message in this position,

identifying a plurality of image areas in the graphical representation of the handwritten message based on said position data and said time data, the size of each image area being smaller than the graphical representation of the complete handwritten message,

determining an ordering of said plurality of image areas based on said time data, and

providing display data to said screen, wherein said display data comprises a sequence of the plurality of image areas to be displayed on said screen according to said ordering,

wherein the handwritten message is a hard copy representation created on a position-coding pattern.

2. A method as claimed in claim 1, wherein the handwritten message comprises handwritten objects, the method further comprising:

determining distances between the handwritten objects in space and in time based on said position data and said time data;

wherein said identifying said plurality of image areas comprises identifying one or more of the handwritten objects based on the distances in space and in time.

3. A method as claimed in claim 2, wherein said handwritten objects are arranged substantially along an axis in the graphical representation of the handwritten message, said method further comprising,

determining distances along said axis based on said position data and said time data;

and

identifying an image area which comprises one more of said handwritten objects based on the determined distances along said axis and in time from the other handwritten objects in the identifying step.

4. A method as claimed in claim 3, wherein said handwritten objects are handwritten words which are arranged in lines and said distances along said axis are spaces between successive words in a line.

5. A method as claimed in claim 1, wherein said graphical representation of a handwritten message is provided by displacement of an optical sensor in relation to a position-coding pattern, and wherein said position data and said time data are provided by the optical sensor by detecting positions in said pattern and points of time, associated with said positions.

6. A computer-readable medium which has executable instructions for carrying out the steps in claim 1.

7. The method of claim 1, wherein said plurality of image areas are mutually non-overlapping in the graphical representation of the handwritten message.

8. The method of claim 1, further comprising:

searching said handwritten message for handdrawn pictures, and

excluding said handdrawn pictures from said handwritten message in said identifying of image areas.

9. The method of claim 8, wherein said searching comprises searching said handwritten message for predetermined gestures.

10. The method of claim 8, wherein said searching comprises identifying an encircling object in said handwritten message.

11. The method of claim 8, further comprising:

providing each handdrawn picture as an ordered image area in said display data.

12. The method of claim 1, wherein the ordering facilitates display on a screen whose size is smaller than the handwritten message.

13. A method for presentation of a graphical representation of a handwritten message on a screen, comprising

receiving position data which indicates positions for the handwritten message wherein the position data graphically represents the handwritten message,

receiving time data, which for each position of the handwritten message indicates a point of time for the creation of the handwritten message in this position,

identifying a selected point of time,

identifying an image area around a position that corresponds to the selected point of time, the size of the image area being smaller than the graphical representation of the complete handwritten message, and

providing display data to said screen, which display data comprises a graphical representation of that part of the handwritten message which has been created up to said point of time and which fits within said image area,

wherein the handwritten message is a hard copy representation created on a position-coding pattern.

14. The method of claim 13, further comprising:

repeatedly effecting said steps of identifying and providing for successive points of time, to thereby generate an animation on said screen of the creation of the handwritten message.

15. A method as claimed in claim 13, wherein said graphical representation of a handwritten message is provided by displacement of an optical sensor in relation to a position-coding pattern, and wherein said position data and said time data are provided by the optical sensor by detecting positions in said pattern and points of time, associated with said positions.

16. An apparatus for presentation of a graphical representation of a handwritten message on a graphical screen, comprising a memory storing a set of instructions;

and a processor configured to execute the set of instructions stored in memory to perform a method for presenting the graphical representation, the method comprising;

receiving position data which indicates positions of the handwritten message and time data which for each position of the handwritten message indicates a point of time for the creation of the handwritten message in this position, wherein the handwritten message is a hard copy representation created on a position-coding pattern, and wherein the position data graphically represents the handwritten message,

identifying a plurality of image areas in the graphical representation of the handwritten message based on said position data and said time data, the size of each of the plurality of image areas being smaller than the graphical representation of the complete handwritten message,

determining an ordering of said plurality of image areas based on said time data, and

providing display data to said screen, which display data comprises a sequence of the plurality of image areas to be displayed on the screen according to the determined ordering.

17. An apparatus as claimed in claim 16, wherein the handwritten message comprises handwritten objects,

said processor further configured to determine distances between the handwritten objects in space and time based on said position data and said time data, and to identify said plurality of image areas which comprises one or more of the handwritten objects based on the distance in space and time between these and other handwritten objects.

18. An apparatus as claimed in claim 17, wherein the handwritten objects are arranged substantially along an axis in the graphical representation of the handwritten message, and

said processor further configured to determine a distance along said axis and in time between the handwritten objects based on said position data and said time data, and to identify an image area which comprises one or more handwritten objects based on the determined distance along said axis and in time from the other handwritten objects.

19. An apparatus as claimed in claim 18, wherein said handwritten objects are handwritten words which are arranged in lines and said distances along said axis are spaces between successive words in a line.

20. An apparatus as claimed in claim 16, further comprising an optical sensor for providing said graphical representation of a handwritten message by displacement relative to a position-coding pattern, and for providing said position data and said time data by detecting positions in said pattern and points of time, associated with said positions.

21. An apparatus for presentation of a graphical representation of a hand written message on a screen, comprising a memory storing a set of instructions;

and a processor configured to execute the set of instructions stored in memory to perform a method for presenting the graphical representation, the method comprising;

receiving position data which indicates positions of the handwritten message and time data which for each position of the handwritten message indicates a point of time for the creation of the handwritten message in this position, wherein the handwritten message is a hard copy representation created on a position-coding pattern, and wherein the position data graphically represents the handwritten message,

identifying a selected point of time and identifying an image area around a position that corresponds to the selected point of time, the size of the image area being smaller than the graphical representation of the complete handwritten message, and

providing display data to said screen, which display data comprises a graphical representation of that part of the handwritten message which has been created up to said point of time and which fits within said image area.