Free viewpoint video

• US 8,223,192 B2
• Filed: 10/31/2007
• Issued: 07/17/2012
• Est. Priority Date: 10/31/2007
• Status: Active Grant

• Current Assignee: TECHNION RESEARCH AND DEVELOPMENT FOUNDATION, LTD.
• Original Assignee: TECHNION RESEARCH AND DEVELOPMENT FOUNDATION, LTD.
• Inventors: Gotsman, Craig, Bogomjakov, Alexander
• Primary Examiner(s): Hamza, Faruk
• Application Number:
  US11/930,186
• Publication Number:
  US 20090109280A1
• Time in Patent Office: 1,721 Days
• Field of Search: 348/36, 348/39, 348/47, 348/48
• US Class Current: 348/39
• CPC Class Codes: H04N 5/2628 Alteration of picture size, shape, position or orientation, e.g. zooming, rotation, rolling, perspective, translation
• CPC Class Codes: H04N 5/76 Television signal recording
• CPC Class Codes: H04N 7/181 for receiving images from a plurality of remote sources

Abstract

A method of remotely viewing a video from a selected viewpoint selected by the viewer from a continuous segment, including, recording a video of a subject using at least one depth video camera that records a video comprising a sequence of picture frames and additionally records a depth value for each pixel of the picture frames, recording a video of the subject using at least one standard video camera positioned to record a video at a viewpoint that differs from the viewpoint of the depth video camera, rendering a depth hull that defines a three dimensional outline of the subject being recorded using the depth values recorded by the depth video cameras, providing the recorded video from one or more cameras positioned on either side of the selected viewpoint, incorporating the recorded video from the one or more cameras onto the rendered depth hull to render a viewable video from the selected viewpoint; and displaying the rendered viewable video to the viewer.

Claims

1. A method of remotely viewing a video from a selected viewpoint selected by the viewer from a continuous segment, comprising:

receiving a recording of a video of a subject recorded using at least one depth video camera that records a video comprising a sequence of picture frames and additionally records a depth value for each pixel of the picture frames;

receiving a recording of a video of the subject recorded using at least one standard video camera positioned to record a video at a viewpoint that differs from the viewpoint of the depth video camera;

wherein said at least one depth video camera and said at least one standard video camera are operated synchronously;

rendering a depth hull that defines a three dimensional outline of the subject being recorded using the depth values recorded by the depth video cameras;

providing the recorded video from one or more cameras positioned on either side of the selected viewpoint;

incorporating the recorded video from the one or more cameras onto the rendered depth hull to render a viewable video from the selected viewpoint; and

displaying the rendered viewable video to the viewer.

2. A method according to claim 1, wherein said continuous segment encompasses 360 degrees around the subject.

3. A method according to claim 1, wherein said continuous segment encompasses less than 360 degrees around the subject.

4. A method according to claim 1, wherein said recording is performed using at least 2 depth video cameras.

5. A method according to claim 4, wherein said at least 2 depth video cameras are positioned on opposite sides of the subject.

6. A method according to claim 1, wherein said recording is performed using at least 2 depth video cameras and at least 2 standard video cameras surrounding the subject.

7. A method according to claim 1, wherein said rendering is performed by a server connected to the video cameras and provided to the remote viewer.

8. A method according to claim 1, wherein said rendering is performed by the remote viewer.

9. A method according to claim 1, wherein said providing comprises transmitting the information to the remote viewers.

10. A method according to claim 1, wherein said incorporating is performed by the renderer of the depth hull.

11. A method according to claim 1, wherein said 3 dimensional outline surrounds the entire shape of the subject.

12. A system for remotely viewing a video from a selected viewpoint selected by the viewer from a continuous segment, comprising:

at least one depth video camera that records a video of a subject comprising a sequence of picture frames and additionally records a depth value for each pixel of the picture frames;

at least one standard video camera positioned to record a video of the subject at a viewpoint that differs from the viewpoint of the depth video camera;

wherein said at least one depth video camera and said at least one standard video camera are operated synchronously;

a computer adapted to receive the recordings of all the video cameras and render a depth hull that defines a three dimensional outline of the subject being recorded using the depth values recorded by the depth video cameras;

one or more remote viewer stations that are adapted to;

1) select a viewpoint for viewing the recorded subject;

2) receive the rendered depth hull;

3) receive the recorded video from the recordings of one or more video cameras positioned on either side of the selected viewpoint of the viewer;

4) incorporate the received recorded video onto the depth hull to render a viewable video from the selected viewpoint; and

5) display the rendered viewable video to the viewer.

13. A system according to claim 12, comprising at least two depth video cameras.

14. A system according to claim 13, wherein said two depth video cameras are positioned on opposite sides of the recorded subject.

15. A system according to claim 12, comprising at least 2 depth video cameras and at least 2 standard video cameras surrounding the subject.

16. A system according to claim 12, wherein said computer is adapted to control the order of recording picture frames and depth values by the video cameras.

17. A system according to claim 12, wherein said continuous segment encompasses 360 degrees around the subject.

18. A system according to claim 12, wherein said continuous segment encompasses less than 360 degrees around the subject.

19. A system according to claim 12, wherein said 3 dimensional outline surrounds the entire shape of the subject.

20. A system for remotely viewing a video from a selected viewpoint selected by the viewer from a continuous segment, comprising:

at least one depth video camera that records a video of a subject comprising a sequence of picture frames and additionally records a depth value for each pixel of the picture frames;

at least one standard video camera positioned to record a video of the subject at a viewpoint that differs from the viewpoint of the depth video camera;

wherein said at least one depth video camera and said at least one standard video camera are operated synchronously;

a computer adapted to receive the recordings of all the video cameras;

one or more remote viewer stations that are adapted to;

1) render a depth hull that defines a three dimensional outline of the subject being recorded using the depth values recorded by the depth video cameras;

2) select a viewpoint for viewing the recorded subject;

3) receive the recorded video from the recordings of one or more video cameras positioned on either side of the selected viewpoint of the viewer;

4) incorporate the received recorded video onto the depth hull to render a viewable video from the selected viewpoint; and

5) display the rendered viewable video to the viewer.

21. A system according to claim 20, wherein said 3 dimensional outline surrounds the entire shape of the subject.

22. A non-transitory computer readable medium comprising a set of computer executable instructions adapted to perform the following method:

receiving a recording of a video of a subject recorded using at least one depth video camera that records a video comprising a sequence of picture frames and additionally records a depth value for each pixel of the picture frames;

receiving a recording of a video of the subject recorded using at least one standard video camera positioned to record a video at a viewpoint that differs from the viewpoint of the depth video camera;

wherein said at least one depth video camera and said at least one standard video camera are operated synchronously;

rendering a depth hull that defines a three dimensional outline of the subject being recorded using the depth values recorded by the depth video cameras;

providing the recorded video from one or more cameras positioned on either side of the selected viewpoint;

incorporating the recorded video from the one or more cameras onto the rendered depth hull to render a viewable video from the selected viewpoint; and

displaying the rendered viewable video to the viewer.