Stereo viewing

• US 10,645,369 B2
• Filed: 02/13/2017
• Issued: 05/05/2020
• Est. Priority Date: 04/07/2014
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Technologies Oy (Nokia Corporation)
• Inventors: Gronholm, Kim, Baldwin, Andrew Robert
• Primary Examiner(s): Bailey, Frederick D
• Application Number:
  US15/430,779
• Publication Number:
  US 20170155884A1
• Time in Patent Office: 1,177 Days
• Field of Search: None
• CPC Class Codes: G02B 2027/0134 of stereoscopic type
• CPC Class Codes: G02B 2027/0187 slaved to motion of at least a part of the body of the user, e.g. head, eye
• CPC Class Codes: G02B 27/0093 with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking
• CPC Class Codes: G02B 30/34 Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers
• CPC Class Codes: G03B 35/08 by simultaneous recording
• CPC Class Codes: G03B 35/18 by simultaneous viewing
• CPC Class Codes: G03B 37/04 with cameras or projectors providing touching or overlapping fields of view
• CPC Class Codes: G06F 3/011 Arrangements for interaction with the human body, e.g. for user immersion in virtual reality blind teaching G09B21/00
• CPC Class Codes: G06F 3/012 Head tracking input arrangements
• CPC Class Codes: G06F 3/04815 Interaction with a metaphor-based environment or interaction object displayed as three-dimensional, e.g. changing the user viewpoint with respect to the environment or object
• CPC Class Codes: G06F 3/16 Sound input; Sound output speech processing G10L
• CPC Class Codes: H04N 13/156 Mixing image signals
• CPC Class Codes: H04N 13/161 Encoding, multiplexing or demultiplexing different image signal components for multi-view video sequence encoding H04N19/597
• CPC Class Codes: H04N 13/189 Recording image signals; Reproducing recorded image signals
• CPC Class Codes: H04N 13/243 using three or more 2D image sensors
• CPC Class Codes: H04N 13/257 Colour aspects
• CPC Class Codes: H04N 13/279 the virtual viewpoint locations being selected by the viewers or determined by tracking
• CPC Class Codes: H04N 13/282 for generating image signals corresponding to three or more geometrical viewpoints, e.g. multi-view systems
• CPC Class Codes: H04N 13/296 Synchronisation thereof; Control thereof
• CPC Class Codes: H04N 13/324 Colour aspects
• CPC Class Codes: H04N 13/344 : with head-mounted left-right displays
• CPC Class Codes: H04N 13/366 : using viewer tracking
• CPC Class Codes: H04N 13/378 : for tracking rotational head movements around an axis perpendicular to the screen
• CPC Class Codes: H04N 13/383 : for tracking with gaze detection, i.e. detecting the lines of sight of the viewer's eyes
• CPC Class Codes: H04N 19/124 : Quantisation
• CPC Class Codes: H04N 19/162 : User input
• CPC Class Codes: H04N 19/167 : Position within a video image, e.g. region of interest [ROI]
• CPC Class Codes: H04N 19/17 : the unit being an image region, e.g. an object
• CPC Class Codes: H04N 19/597 : specially adapted for multi-view video sequence encoding
• CPC Class Codes: H04N 2213/008 : Aspects relating to glasses for viewing stereoscopic images

Abstract

The invention relates to creating and viewing stereo images, for example stereo video images, also called 3D video. At least three camera sources with overlapping fields of view are used to capture a scene so that an area of the scene is covered by at least three cameras. At the viewer, a camera pair is chosen from the multiple cameras to create a stereo camera pair that best matches the location of the eyes of the user if they were located at the place of the camera sources. That is, a camera pair is chosen so that the disparity created by the camera sources resembles the disparity that the user'"'"'s eyes would have at that location. If the user tilts his head, or the view orientation is otherwise altered, a new pair can be formed, for example by switching the other camera. The viewer device then forms the images of the video frames for the left and right eyes by picking the best sources for each area of each image for realistic stereo disparity.

Claims

1. A method, comprising:

encoding a plurality of source video signals for stereo viewing, said source video signals comprising video data from a plurality of camera sources, said source video signals comprising active scene area signals and passive scene area signals that correspond to a head orientation of a user such that the active scene area signals correspond to a portion of a scene area that is visible by the user and the passive scene area signals correspond to other portions of the scene area that are not currently visible by the user, wherein said encoding is carried out such that the passive scene area signals have a first fidelity and the active scene signals have a second fidelity greater than the first fidelity;

transmitting said plurality of source video signals to a stereo viewing device for viewing; and

detecting a change in a viewing direction based on a change in the head orientation, wherein the active scene area signals and the passive scene area signals change responsive to the change in the viewing direction, such that the fidelity or respective fidelities of at least one portion of the scene area change in response to the change in the viewing direction.

2. The method according to claim 1, wherein said source video signals comprising at least three active scene area signals so that said at least three active scene area signals cover a region of a scene so that at least two different pairs of said active scene area signals can be used to create a stereoscopic video of said region of a scene.

3. The method of claim 1, wherein the fidelity or the respective fidelities of at least one portion of the scene area change by changing a spatial resolution.

4. The method of claim 1, wherein the fidelity or the respective fidelities of at least one portion of the scene area change by changing a color coding resolution.

5. The method of claim 1, wherein the fidelity or the respective fidelities of at least one portion of the scene area change by changing a frame rate.

6. The method of claim 1, wherein the fidelity or the respective fidelities of at least one portion of the scene area change by changing a number of bits by identifying and eliminating a statistical redundancy.

7. The method of claim 1, wherein the fidelity or the respective fidelities of at least one portion of the scene area change in one frame relative to the respective fidelities of the at least one portion of the scene area in another frame.

8. An apparatus comprising at least one processor, and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to at least:

encode a plurality of source video signals for stereo viewing, said source video signals comprising video data from a plurality of camera sources, said source video signals comprising active scene area signals and passive scene area signals that correspond to a head orientation of a user such that the active scene area signals correspond to a portion of a scene area that is visible by the user and the passive scene area signals correspond to other portions of the scene area that are not currently visible by the user, wherein said encoding is carried out such that the passive scene area signals have a first fidelity and the active scene signals have a second fidelity greater than the first fidelity;

transmit said plurality of source video signals to a stereo viewing device for viewing; and

detect a change in a viewing direction based on a change in the head orientation, wherein the active scene area signals and the passive scene area signals change responsive to the change in the viewing direction, such that the fidelity or respective fidelities of at least one portion of the scene area change in response to the change in the viewing direction.

9. The apparatus according to claim 8, wherein said source video signals comprising at least three active scene area signals so that said at least three active scene area signals cover a region of a scene so that at least two different pairs of said active scene area signals can be used to create a stereoscopic video of said region of a scene.

10. The apparatus of claim 8, wherein the fidelity or the respective fidelities of at least one portion of the scene area change by changing a spatial resolution.

11. The apparatus of claim 8, wherein the fidelity or the respective fidelities of at least one portion of the scene area change by changing a color coding resolution.

12. The apparatus of claim 8, wherein the fidelity or the respective fidelities of at least one portion of the scene area change by changing a frame rate.

13. The apparatus of claim 8, wherein the fidelity or the respective fidelities of at least one portion of the scene area change by changing a number of bits by identifying and eliminating a statistical redundancy.

14. The apparatus of claim 8, wherein the fidelity or the respective fidelities of at least one portion of the scene area change in one frame relative to the respective fidelities of the at least one portion of the scene area in another frame.

15. A computer program product embodied on a non-transitory computer readable medium, comprising computer program code configured to, when executed on at least one processor, cause an apparatus or a system to:

encode a plurality of source video signals for stereo viewing, said source video signals comprising video data from a plurality of camera sources, said source video signals comprising active scene area signals and passive scene area signals that correspond to a head orientation of a user such that the active scene area signals correspond to a portion of a scene area that is visible by the user and the passive scene area signals correspond to other portions of the scene area that are not currently visible by the user, wherein said encoding is carried out such that the passive scene area signals have a first fidelity and the active scene signals have a second fidelity greater than the first fidelity;

transmit said plurality of source video signals to a stereo viewing device for viewing; and

detect a change in a viewing direction based on a change in the head orientation, wherein the active scene area signals and the passive scene area signals change responsive to the change in the viewing direction, such that the fidelity or respective fidelities of at least one portion of the scene area change in response to the change in the viewing direction.

16. The computer program product according to claim 15, wherein said source video signals comprising at least three active scene area signals so that said at least three active scene area signals cover a region of a scene so that at least two different pairs of said active scene area signals can be used to create a stereoscopic video of said region of a scene.

17. The computer program product of claim 15, wherein the fidelity or the respective fidelities of at least one portion of the scene area change by changing a spatial resolution.

18. The computer program product of claim 15, wherein the fidelity or the respective fidelities of at least one portion of the scene area change by changing a color coding resolution.

19. The computer program product of claim 15, wherein the fidelity or the respective fidelities of at least one portion of the scene area change by changing a frame rate.

20. The computer program product of claim 15, wherein the fidelity or the respective fidelities of at least one portion of the scene area change by changing a number of bits by identifying and eliminating a statistical redundancy.