System and method for a motion visualizer

• US 20050265580A1
• Filed: 05/23/2005
• Published: 12/01/2005
• Est. Priority Date: 05/27/2004
• Status: Abandoned Application

• Current Assignee: Nathan Kimball, Paul Antonucci, Ricardo Nemirovsky
• Original Assignee: Nathan Kimball, Paul Antonucci, Ricardo Nemirovsky
• Inventors: Kimball, Nathan, Nemirovsky, Ricardo, Antonucci, Paul
• Application Number:
  US11/135,577
• Publication Number:
  US 20050265580A1
• Time in Patent Office: Days
• US Class Current: 382/103
• CPC Class Codes: G06T 11/206 Drawing of charts or graphs
• CPC Class Codes: G06T 7/20 Analysis of motion motion estimation for coding, decoding, compressing or decompressing digital video signals H04N19/43, H04N19/51
• CPC Class Codes: G06V 40/23 Recognition of whole body movements, e.g. for sport training

Abstract

A system for capturing and displaying the motion of an object includes a first equipment for capturing a first set of visual images of the object'"'"'s motion over time and a computing device for receiving a signal of the first set of visual images of the object'"'"'s motion and converting the signal of the first set of visual images into a graphical representation of the object'"'"'s motion. The system displays the graphical representation of the object'"'"'s motion on a display screen in real time with the capturing of the first set of visual images. The system may also include a second equipment for capturing a second set of visual images of the object'"'"'s motion over time and the computing device then combines the first and second set of visual images to provide a real-time three-dimensional graphical representation of the object'"'"'s motion.

Claims

1. A system for capturing and displaying motion of an object comprising:

a first equipment for capturing a first set of visual images of said object'"'"'s motion over time;

a computing device for receiving a signal of said first set of visual images of said object'"'"'s motion and converting said signal of said first set of visual images into a graphical representation of said object'"'"'s motion and displaying said graphical representation of said object'"'"'s motion on a display screen in real time with said capturing of said first set of visual images.

2. The system of claim 1 wherein said graphical representation of said object'"'"'s motion comprises a position coordinate graph.

3. The system of claim 1 wherein said graphical representation of said object'"'"'s motion comprises a position versus said time graph.

4. The system of claim 2 further comprising a second equipment for capturing a second set of visual images of said object'"'"'s motion over said time and wherein said computing device receives a signal of said second set of visual images and combines said second set visual image signal with said first set visual image signal and converts said combined first set and second set visual image signals into a graphical representation of said object'"'"'s motion and displays said graphical representation on said display screen in real time with said capturing of said first set and second set of visual images.

5. The system of claim 4 wherein said graphical representation comprises a three-dimensional position coordinate graph.

6. The system of claim 5 wherein said computing device converts said combined first set and second set visual image signals into a graphical representation of said object'"'"'s motion via triangulation.

7. The system of claim 6 wherein said first and said second equipment comprise a first and a second optical axis, respectively, and are arranged so that their corresponding first and second optical axes are at a known angle and said first and said second equipment are equidistant from said first and said second optical axes'"'"' intersection point.

8. The system of claim 7 wherein said three dimensional position coordinate graph comprises said object'"'"'s position coordinates plotted in a three dimensional x-y-z Cartesian coordinate system and wherein said x-y-z Cartesian coordinate system comprises an origin located at said intersection point of said first and said second optical axes, an x-axis running parallel to a line joining said first and said second equipment, a y-axis running perpendicular to said line joining said first and said second equipment directly between said first and said second capturing equipment and a z-axis running vertical through said origin.

9. The system of claim 8 wherein the length of said line joining said first and said second equipment is used to scale and calculate said position coordinates in true distance units.

10. The system of claim 1 further comprising a video controller for receiving an analog signal of said first set of visual images, locating said object and transmitting a signal of said object'"'"'s location to said computing device.

11. The system of claim 10 wherein said object comprises a bright color and said video controller locates said object in said first set of visual images based on said bright color exceeding a set threshold level of brightness.

12. The system of claim 10 wherein said signal of said object'"'"'s location comprises average x-pixel position, average y-pixel position, object average height, and object average width.

13. The system of claim 1 wherein said signal comprises a digital video signal and said computing device further comprises an object locating algorithm for receiving said digital video signal and locating said object.

14. The system of claim 13 wherein said object comprises a bright color and said object locating algorithm locates said object'"'"'s position coordinate data in said first set of visual images based on said bright color exceeding a set threshold level of brightness.

15. The system of claim 14 wherein said object'"'"'s position coordinate data comprise average x-pixel position, average y-pixel position, object average height, and object average width

16. The system of claim 1 wherein said first set of visual images comprise motions of more than one objects.

17. The system of claim 1 wherein said first set of visual images are captured at a frequency of 30 times per second.

18. The system of claim 4 wherein said first set and said second set of visual images are captured at a frequency of 30 times per second each and said computing device receives interlaced images of said first set and said second set of visual images at a frequency of 60 times per second.

19. The system of claim 1 wherein said first capturing equipment is selected from a group consisting of a video camera, a video recorder, a NTSC camcorder, and a PAL camcorder.

20. The system of claim 1 wherein said graphical representation of said object'"'"'s motion comprises a velocity versus time graph.

21. The system of claim 1 wherein said graphical representation of said object'"'"'s motion comprises an acceleration versus time graph.

22. The system of claim 8 wherein said object'"'"'s position coordinate data are smoothed to correct for small and random errors via an algorithm that fits a parabola to an odd number of adjacent position coordinate data using a least-squares method.

23. The system of claim 8 wherein said object'"'"'s position coordinate data are filtered using filters selected from a group consisting of a minimum object size filter, a debounce horizontal filter, a debounce vertical filter, and an object overlap filter.

24. The system of claim 1 wherein said computing device is selected from a group consisting of a personal computer, a notebook computer, a server, a computing circuit, and a personal digital assistant (PDA).

25. A method for capturing and displaying motion of an object comprising:

providing a first equipment for capturing a first set of visual images of said object'"'"'s motion over time;

providing a computing device for receiving a signal of said first set of visual images of said object'"'"'s motion and converting said signal of said first set of visual images into a graphical representation of said object'"'"'s motion and displaying said graphical representation of said object'"'"'s motion on a display screen in real time with said capturing of said first set of visual images.

26. The method of claim 25 wherein said graphical representation of said object'"'"'s motion comprises a position coordinate graph.

27. The method of claim 25 wherein said graphical representation of said object'"'"'s motion comprises a position versus said time graph.

28. The method of claim 26 further comprising providing a second equipment for capturing a second set of visual images of said object'"'"'s motion over said time and wherein said computing device receives a signal of said second set of visual images and combines said second set visual image signal with said first set visual image signal and converts said combined first set and second set visual image signals into a graphical representation of said object'"'"'s motion and displays said graphical representation on said display screen in real time with said capturing of said first set and second set of visual images.

29. The method of claim 28 wherein said graphical representation comprises a three-dimensional position coordinate graph.

30. The method of claim 29 wherein said computing device converts said combined first set and second set visual image signals into a graphical representation of said object'"'"'s motion via triangulation.

31. The method of claim 30 wherein said first and said second equipment comprise a first and a second optical axis, respectively, and are arranged so that their corresponding first and second optical axes are at a known angle and said first and said second equipment are equidistant from said first and said second optical axes'"'"' intersection point.

32. The method of claim 31 wherein said three dimensional position coordinate graph comprises said object'"'"'s position coordinates plotted in a three dimensional x-y-z Cartesian coordinate system and wherein said x-y-z Cartesian coordinate system comprises an origin located at said intersection point of said first and said second optical axes, an x-axis running parallel to a line joining said first and said second equipment, a y-axis running perpendicular to said line joining said first and said second equipment directly between said first and said second capturing equipment and a z-axis running vertical through said origin.

33. The method of claim 32 wherein the length of said line joining said first and said second equipment is used to scale and calculate said position coordinates in true distance units.

34. The method of claim 25 further comprising providing a video controller for receiving an analog signal of said first set of visual images, locating said object and transmitting a signal of said object'"'"'s location to said computing device.

35. The method of claim 34 wherein said object comprises a bright color and said video controller locates said object in said first set of visual images based on said bright color exceeding a set threshold level of brightness.

36. The method of claim 34 wherein said signal of said object'"'"'s location comprises average x-pixel position, average y-pixel position, object average height, and object average width.

37. The method of claim 25 wherein said signal comprises a digital video signal and said computing device further comprises an object locating algorithm for receiving said digital video signal and locating said object.

38. The method of claim 37 wherein said object comprises a bright color and said object locating algorithm locates said object'"'"'s position coordinate data in said first set of visual images based on said bright color exceeding a set threshold level of brightness.

39. The method of claim 38 wherein said object'"'"'s position coordinate data comprise average x-pixel position, average y-pixel position, object average height, and object average width

40. The method of claim 25 wherein said first set of visual images comprise motions of more than one objects.

41. The method of claim 25 wherein said first set of visual images are captured at a frequency of 30 times per second.

42. The method of claim 29 wherein said first set and said second set of visual images are captured at a frequency of 30 times per second each and said computing device receives interlaced images of said first set and said second set of visual images at a frequency of 60 times per second.

43. The method of claim 25 wherein said first capturing equipment is selected from a group consisting of a video camera, a video recorder, a NTSC camcorder, and a PAL camcorder.

44. The method of claim 25 wherein said graphical representation of said object'"'"'s motion comprises a velocity versus time graph.

45. The method of claim 25 wherein said graphical representation of said object'"'"'s motion comprises an acceleration versus time graph.

46. The method of claim 32 wherein said object'"'"'s position coordinate data are smoothed to correct for small and random errors via an algorithm that fits a parabola to an odd number of adjacent position coordinate data using a least-squares method.

47. The method of claim 32 wherein said object'"'"'s position coordinate data are filtered using filters selected from a group consisting of a minimum object size filter, a debounce horizontal filter, a debounce vertical filter, and an object overlap filter.

48. The method of claim 25 wherein said computing device is selected from a group consisting of a personal computer, a notebook computer, a server, a computing circuit, and a personal digital assistant (PDA).

49. A method of using real-time video analysis of an object'"'"'s motion for teaching kinematic processes in physics and mathematics courses comprising:

providing a system for capturing and displaying motion of an object said system comprising a first equipment for capturing a first set of visual images of said object'"'"'s motion over time and a computing device for receiving a signal of said first set of visual images of said object'"'"'s motion and converting said signal of said first set of visual images into a graphical representation of said object'"'"'s motion and displaying said graphical representation of said object'"'"'s motion on a display screen in real time with said capturing of said first set of visual images;

asking a student to imagine and draw a three dimensional representation of a first object'"'"'s motion;

performing said first object'"'"'s motion and capturing said first object'"'"'s motion with said system for capturing and displaying motion of an object;

comparing said student'"'"'s drawing of said three-dimensional representation of said first object'"'"'s motion with said display of said first object'"'"'s motion by said system.