Non-linear navigation of a three dimensional stereoscopic display
Systems and methods for navigating a 3D stereoscopic scene displayed via a 3D stereoscopic display system using user head tracking. A reference POV including a reference user head position and a reference user head orientation may be established. The user head POV may be tracked, including monitoring user head positional displacements and user head angular rotations relative to the reference POV. In response to the tracking, a camera POV used to render the 3D stereoscopic scene may be adjusted based on a non-linear mapping between changes in the camera POV and the user head positional displacements and user head angular rotations relative to the reference POV. The non-linear mapping may include a mapping of user head positional displacements relative to the reference POV to translational movements in the camera POV and a mapping of user head angular rotations relative to the reference POV to rotations in the camera POV.
1. A method for navigating a three dimensional (3D) stereoscopic scene displayed via a 3D stereoscopic display system, the method comprising:
enabling a user head tracking navigational mode of the 3D stereoscopic display system;
establishing a reference point of view (POV), wherein the reference POV comprises a reference user head position and a reference user head orientation;
tracking user head POV, wherein said tracking monitors user head positional displacements and user head angular rotations relative to the reference POV; and
adjusting, in response to said tracking, a camera POV used to render the 3D stereoscopic scene, wherein said adjusting is based on a non-linear mapping between changes in the camera POV and the user head positional displacements and user head angular rotations relative to the reference POV, and wherein the non-linear mapping comprises:
a mapping of user head positional displacements relative to the reference POV to translational movements in the camera POV; and
a mapping of user head angular rotations relative to the reference POV to rotations in the camera POV.
2. The method of claim 1 , wherein said enabling comprises:
receiving user input enabling the head tracking navigational mode via one or more of:
a user interface displayed within the 3D stereoscopic scene; or
an input device of the 3D stereoscopic display system.
3. The method of claim 2 , wherein the input device is a user control element.
4. The method of claim 1 , wherein said adjusting further comprises adjusting one or more 3D stereoscopic rendering variables, and wherein said adjusting is further based on a non-linear mapping of each of the one or more 3D stereoscopic rendering variables to the camera POV.
5. The method of claim 4 , wherein the one or more 3D stereoscopic rendering variables comprise one or more of:
a world scale variable;
a stereo level variable;
a zero parallax offset variable; or
a head-tracking scale variable.
6. The method of claim 1 , wherein the non-linear mapping further comprises:
a mapping of rate of change of user head positional displacements relative to the reference POV to rate of change of translational movements in the camera POV; and
a mapping of rate of change of user head angular rotations relative to the reference POV to rate of change of rotations in the camera POV.
7. The method of claim 1 , wherein said adjusting occurs in real-time.
8. The method of claim 1 , wherein the camera POV corresponds to a frustum field of view angle.
9. A non-transitory computer readable memory medium storing programming instructions for navigating a three dimensional (3D) stereoscopic scene displayed via a 3D stereoscopic display system, wherein the programming instructions are executable by a processor to:
enable a user head tracking navigational mode of the 3D stereoscopic display system;
establish a reference point of view (POV), wherein the reference POV comprises a reference user head position and a reference user head orientation;
track user head POV, wherein said tracking monitors user head positional displacements and user head angular rotations relative to the reference POV; and
adjust, in response to tracking user head POV, a camera POV used to render the 3D stereoscopic scene, wherein said adjusting is based on a non-linear mapping between changes in the camera POV and the user head positional displacements and user head angular rotations relative to the reference POV, and wherein the non-linear mapping comprises:
a mapping of user head positional displacements relative to the reference POV to translational movements in the camera POV; and
a mapping of user head angular rotations relative to the reference POV to rotations in the camera POV.
10. The non-transitory computer readable memory medium of claim 9 , wherein to enable a user head tracking navigational mode of the 3D stereoscopic display system the programming instructions are further executable by a processor to:
receive user input enabling the head tracking navigational mode via one or more of:
a user interface displayed within the 3D stereoscopic scene; or
an input device of the 3D stereoscopic display system.
11. The non-transitory computer readable memory medium of claim 10 , wherein the input device is a user control element.
12. The non-transitory computer readable memory medium of claim 9 , wherein to adjust the camera POV the programming instructions are further executable by a processor to adjust one or more 3D stereoscopic rendering variables, and wherein said adjusting is further based on a non-linear mapping of each of the one or more 3D stereoscopic rendering variables to the camera POV.
13. The non-transitory computer readable memory medium of claim 12 , wherein the one or more 3D stereoscopic rendering variables comprise one or more of:
a world scale variable;
a stereo level variable;
a zero parallax offset variable; or
a head-tracking scale.
14. The non-transitory computer readable memory medium of claim 9 , wherein the non-linear mapping further comprises:
a mapping of rate of change of user head positional displacements relative to the reference POV to rate of change of translational movements in the camera POV; and
a mapping of rate of change of user head angular rotations relative to the reference POV to rate of change of rotations in the camera POV.
15. The non-transitory computer readable memory medium of claim 9 , wherein said adjusting is executed in real-time.
16. The non-transitory computer readable memory medium of claim 9 , wherein the camera POV corresponds to a frustum field of view angle.
17. A system for navigating a three dimensional (3D) stereoscopic scene displayed via a 3D stereoscopic display system, comprising:
a 3D stereoscopic display system, comprising:
a display screen;
a user head tracking system; and
a functional unit coupled to the user head tracking system and the display screen,
wherein the functional unit is configured to:
enable a user head tracking navigational mode of the 3D stereoscopic display system, wherein the user's head is tracked via the user head tracking system;
establish a reference point of view (POV), wherein the reference POV comprises a reference user head position and a reference user head orientation;
track user head POV via the user head tracking system, wherein said tracking monitors user head positional displacements and user head angular rotations relative to the reference POV; and
adjust, in response to tracking user head POV, a camera POV used to render the 3D stereoscopic scene via the display screen, wherein said adjusting is based on a non-linear mapping between changes in the camera POV and the user head positional displacements and user head angular rotations relative to the reference POV, and wherein the non-linear mapping comprises:
a mapping of user head positional displacements relative to the reference POV to translational movements in the camera POV; and
a mapping of user head angular rotations relative to the reference POV to rotations in the camera POV.
18. The system of claim 17 , further comprising:
an input device;
wherein to enable a user head tracking navigational mode of the 3D stereoscopic display system the functional unit is further configured to:
receive user input enabling the head tracking navigational mode via one or more of:
a user interface displayed within the 3D stereoscopic scene; or
the input device.
19. The system of claim 17 , wherein to adjust the camera POV the functional unit is further configured to adjust one or more 3D stereoscopic rendering variables, and wherein said adjusting is further based on a non-linear mapping of each of the one or more 3D stereoscopic rendering variables to the camera POV.
20. The system of claim 17 , wherein the non-linear mapping further comprises:
a mapping of rate of change of user head positional displacements relative to the reference POV to rate of change of translational movements in the camera POV; and
a mapping of rate of change of user head angular rotations relative to the reference POV to rate of change of rotations in the camera POV.