Mobile communication terminal for estimating motion direction and method thereof

• US 20070019734A1
• Filed: 07/24/2006
• Published: 01/25/2007
• Est. Priority Date: 07/25/2005
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Seung
• Application Number:
  US11/491,147
• Publication Number:
  US 20070019734A1
• Time in Patent Office: Days
• US Class Current: 375/240.160
• CPC Class Codes: G06F 3/0304 Detection arrangements using opto-electronic means constructional details of pointing devices not related to the detection arrangement using opto-electronic means G06F3/033; optical digitisers G06F3/042
• CPC Class Codes: G06T 7/231 using full search

Abstract

A mobile communication terminal including a camera configured to take a plurality of pictures, a processor configured to estimate a motion direction of the terminal using at least some of the plurality of pictures, and a display configured to display information corresponding to the estimated motion direction.

Claims

1. A mobile communication terminal, comprising:

a camera configured to take a plurality of pictures;

a processor configured to estimate a motion direction of the terminal using at least some of the plurality of pictures; and

a display configured to display information corresponding to the estimated motion direction.

2. The mobile terminal of claim 1, wherein the plurality of pictures comprise at least a formerly and latterly consecutively taken picture, and

wherein the processor divides the formerly taken picture into a plurality of first blocks and divides the latterly taken picture into a plurality of second blocks.

3. The mobile terminal of claim 2, wherein the processor determines if at least one block from the plurality of first blocks matches at least one block from the plurality of second blocks, and if the blocks match, estimates the motion direction of the terminal by arranging the formerly and latterly taken pictures together with matching blocks being used as a reference.

4. The mobile terminal of claim 3, wherein if the processor determines the at least one block in the first blocks does not match the at least one block in the second blocks, the processor determines which block from the first blocks has a highest correlation with a block from the second blocks, and uses the blocks with the highest correlation as the reference when estimating the motion direction of the terminal.

5. The mobile terminal of claim 2, wherein the processor selects a reference block in the first blocks and determines whether the reference block is also included in the second blocks, and if the reference block is in both of the first and second blocks, the processor estimates the motion direction of the terminal by arranging the formerly and latterly taken pictures together with reference blocks being used as a reference.

6. The mobile terminal of claim 5, wherein if the processor determines the reference block is not also included in the second blocks, the processor determines which block from the first blocks has a highest correlation with a block from the second blocks, and uses the blocks with the highest correlation as the reference when estimating the motion direction of the terminal.

7. The mobile terminal of claim 2, wherein the processor determines whether a common block exists in both of the first and second blocks, and if the common block exists in both of the first and second blocks, the processor determines a position of the common block in both of the first and second blocks, calculates a motion vector indicating a movement of the common block from the position in the first blocks to the position in the second blocks, and estimates the motion direction of the terminal based on the calculated motion vector.

8. The mobile terminal of claim 7, wherein if the processor determines the common block does not exist in both of the first and second blocks, the processor determines which block from the first blocks has a highest correlation with a block from the second blocks, and uses the blocks with the highest correlation as the reference when estimating the motion direction of the terminal.

9. The mobile terminal of claim 2, further comprising a memory configured to store the plurality of pictures and information data corresponding to the estimated motion direction.

10. The mobile terminal of claim 9, wherein the processor executes a prescribed function on the mobile terminal if the extracted information data indicates the prescribed function is to be executed or the processor displays the information data corresponding to the estimated motion direction on the display.

11. The mobile terminal of claim 9, wherein the extracted information data comprises an a plurality of pieces of information, and the processor determines if a piece of the information is currently being displayed on the display, and displays a next piece of information from the plurality of pieces of information if it is determined the piece of information is currently being displayed based on the estimated motion direction.

12. The mobile terminal of claim 1, wherein the camera takes the plurality of pictures consecutively at a constant rate.

13. A method of estimating a motion direction in a mobile communication terminal, comprising:

taking a plurality of pictures with a camera on the terminal;

estimating the motion direction of the terminal using at least some of the plurality of pictures; and

displaying information corresponding to the estimated motion direction.

14. The method of claim 13, wherein the plurality of pictures comprise at least a formerly and latterly consecutively taken picture, and

wherein the estimating step further comprises dividing the formerly taken picture into a plurality of first blocks and dividing the latterly taken picture into a plurality of second blocks.

15. The method of claim 14, wherein the estimating step further comprises determining if at least one block from the plurality of first blocks matches at least one block from the plurality of second blocks, and if the blocks match, estimating the motion direction of the terminal by arranging the formerly and latterly taken pictures together with matching blocks being used as a reference.

16. The method of claim 15, wherein if the processor determines the at least one block in the first blocks does not match the at least one block in the second blocks, the estimating step further comprises determining which block from the first blocks has a highest correlation with a block from the second blocks, and using the blocks with the highest correlation as the reference when estimating the motion direction of the terminal.

17. The method of claim 14, wherein the estimating step further comprises selecting a reference block in the first blocks and determining whether the reference block is also included in the second blocks, and if the reference block is in both of the first and second blocks, the estimating step further comprises estimating the motion direction of the terminal by arranging the formerly and latterly taken pictures together with reference blocks being used as a reference.

18. The method of claim 17, wherein if the estimating step determines the reference block is not also included in the second blocks, the estimating step further comprises determining which block from the first blocks has a highest correlation with a block from the second blocks, and uses the blocks with the highest correlation as the reference when estimating the motion direction of the terminal.

19. The method of claim 14, wherein the estimating step further comprises determining whether a common block exists in both of the first and second blocks, and if the common block exists in both of the first and second blocks, the estimating step further comprises determining a position of the common block in both of the first and second blocks, calculating a motion vector indicating a movement of the common block from the position in the first blocks to the position in the second blocks, and estimating the motion direction of the terminal based on the calculated motion vector.

20. The method of claim 19, wherein if the estimating step determines the common block does not exist in both of the first and second blocks, the estimating step further comprises determining which block from the first blocks has a highest correlation with a block from the second blocks, and using the blocks with the highest correlation as the reference when estimating the motion direction of the terminal.

21. The method of claim 14, further comprising storing in a memory of the terminal the plurality of pictures and information data corresponding to the estimated motion direction.

22. The method of claim 21, wherein the estimating step further comprises executing a prescribed function on the mobile terminal if the extracted information data indicates the prescribed function is to be executed or displaying the information data corresponding to the estimated motion direction.

23. The method of claim 21, wherein the extracted information data comprises an a plurality of pieces of information, and the estimating step further comprises determining if a piece of the information is currently being displayed, and displaying a next piece of information from the plurality of pieces of information if it is determined the piece of information is currently being displayed based on the estimated motion direction.

24. The method of claim 13, wherein the camera takes the plurality of pictures consecutively at a constant rate.