Stereo camera with preset modes

1. A stereographic camera system, comprising:

a left camera and a right camera including respective lenses;

an interface for receiving a selection of a selected stereographic imaging mode from three or more preset stereographic imaging modes;

a preset parameter memory storing one or more preset stereo parameters associated with each of the three or more preset stereographic imaging modes; and

an interocular distance mechanism to set an interocular distance between the left camera and the right camera based on, at least in part, the one or more preset stereo parameters associated with the selected stereographic imaging mode, wherein

each of the three of more preset stereographic imaging modes is associated with a respective scene to be imaged,

the one or more preset stereo parameters associated with each of the three or more preset stereographic imaging modes are preset based on assumed distances to objects within the respective scene, and

the set interocular distance differs between at least some of the three or more preset stereographic imaging modes.

2. The stereographic camera system of claim 1 , wherein

the one or more preset stereo parameters associated with the selected stereographic imaging mode include a preset interocular distance, and

the interocular distance mechanism sets the interocular distance in accordance with the preset interocular distance.

3. The stereographic camera system of claim 2 , further comprising:

a convergence angle mechanism to set a convergence angle between the left camera and the right camera based on, at least in part, the set interocular distance and a focus distance of the lenses.

4. The stereographic camera system of claim 3 , wherein

the one or more preset stereo parameters associated with the selected stereographic imaging mode include a preset focus distance to convergence distance offset parameter, and

the convergence angle mechanism sets the convergence angle based on the set interocular distance, the focus distance, and the focus distance to convergence distance offset parameter.

5. The stereographic camera system of claim 1 , wherein

the one or more preset stereo parameters associated with the selected stereographic imaging mode include an assumed extreme object distance and an assumed minimum object distance, and

the interocular distance mechanism sets the interocular distance in accordance with a predetermined maximum disparity parameter, a focus distance of the lenses, a focal length of the lenses, and the assumed extreme object distance and the assumed minimum object distance.

6. The stereographic camera system of claim 5 , wherein the one or more preset stereo parameters associated the selected stereographic imaging mode include the predetermined maximum disparity.

7. The stereographic camera system of claim 5 , wherein the predetermined maximum disparity is a common value for all of the plurality of three or more preset stereographic imaging modes.

8. The stereographic camera system of claim 5 , further comprising:

a convergence angle mechanism to set a convergence angle between the left camera and the right camera based on, at least in part, the set interocular distance and the focus distance of the lenses.

9. The stereographic camera system of claim 8 , wherein

the one or more preset stereo parameters associated with the selected stereographic imaging mode include a preset focus distance to convergence distance offset parameter, and

the convergence angle mechanism sets the convergence angle based on the set interocular distance, the focus distance, and the focus distance to convergence distance offset parameter.

10. The stereographic camera system of claim 5 , further comprising:

a controller coupled to the interface, the preset mode parameter memory, and the interocular distance mechanism, the controller to perform actions comprising:

receiving data indicative of the selected stereographic imaging mode from the interface,

retrieving preset parameters associated with the selected stereographic imaging mode from the preset mode parameter memory,

calculating a required interocular distance from the retrieved preset parameters, the predetermined maximum disparity, and the focus distance and the focal length of the lenses, and

sending data indicative of the required interocular distance to the interocular distance mechanism.

11. The stereographic camera system of claim 1 , wherein

the preset parameter memory further storing one or more of a lens aperture, a shutter speed, an exposure time, and electronic flash parameters associated with at least some of the three or more preset operating stereographic imaging modes.

12. A method for controlling a stereographic camera, comprising:

receiving a selection of a selected stereographic imaging mode from three or more preset stereographic imaging modes;

retrieving one or more preset stereo parameters associated with the selected stereographic imaging mode from a preset parameter memory; and

setting an interocular distance between a left camera and a right camera based on, at least in part, the retrieved one or more preset stereo parameters, wherein

each of the three of more preset stereographic imaging modes is associated with a respective scene to be imaged,

the one or more preset stereo parameters associated with each of the three or more preset stereographic imaging modes are preset based on assumed distances to objects within the respective scene, and

the set interocular distance differs between at least some of the there or more preset stereographic imaging modes.

13. The method for controlling a stereographic camera of claim 12 , wherein

the one or more preset stereo parameters associated with the selected stereographic imaging mode include a preset interocular distance, and

setting the interocular distance comprises setting the interocular distance in accordance with the preset interocular distance.

14. The method for controlling a stereographic camera of claim 13 , wherein the left and right cameras have associated left and right lenses, the method further comprising:

setting a convergence angle between the left camera and the right camera based on, at least in part, the set interocular distance and a focus distance of the lenses.

15. The method for controlling a stereographic camera of claim 14 , wherein

the one or more preset stereo parameters associated with the selected stereographic imaging mode include a preset focus distance to convergence distance offset parameter, and

setting the convergence distance comprises setting the convergence angle based on the set interocular distance, the focus distance, and the focus distance to convergence distance offset parameter.

16. The method for controlling a stereographic camera of claim 12 , wherein

the one or more preset stereo parameters associated with the selected stereographic imaging mode include both of an assumed extreme object distance and an assumed minimum object distance, and

setting the interocular distance comprises setting the interocular distance in accordance with a predetermined maximum disparity parameter, a focus distance of the lenses, a focal length of the lenses, and the assumed extreme object distance and the assumed minimum object distance.

17. The method for controlling a stereographic camera of claim 16 , wherein the one or more preset stereo parameters associated with the selected stereographic imaging mode include the predetermined maximum disparity.

18. The method for controlling a stereographic camera of claim 16 , wherein the predetermined maximum disparity is a common value for all of the three or more preset stereographic imaging modes.

19. The method for controlling a stereographic camera of claim 16 , further comprising:

setting a convergence angle between the left camera and the right camera based on, at least in part, the set interocular distance and the focus distance of the lenses.

20. The method for controlling a stereographic camera of claim 19 , wherein

the one or more preset stereo parameters associated with the selected stereographic imaging mode include a preset focus distance to convergence distance offset parameter, and

setting the convergence angle comprises setting the convergence angle based on the set interocular distance, the focus distance, and the focus distance to convergence distance offset parameter.

21. The method for controlling a stereographic camera of claim 16 , wherein the setting the interocular distance comprises setting the interocular distance in accordance with the formula

IOD=minimum (IOD EOD , IOD MOD )

wherein

IOD=the interocular distance

IOD EOD =[CD×AEOD×MD×W]/[(AEOD−CD)×FL]

IOD MOD =[CD×AMOD×MD×W]/[(CD−AMOD)×FL]

W=a width of an image sensor within each camera

FL=the focal length of the lenses

AEOD=the assumed extreme object distance

AMOD=the assumed minimum object distance

MD=the predetermined maximum disparity as a fraction of a width of a scene recorded by the stereographic camera

CD=a convergence distance.

22. The method for controlling a stereographic camera of claim 21 , wherein

the one or more preset stereo parameters associated with the selected stereographic imaging mode include a preset focus distance to convergence distance offset parameter, and

the convergence distance CD is determined based on the focus distance FD of the lenses and the focus distance to convergence distance offset parameter.

23. The method for controlling a stereographic camera of claim 21 , wherein

the stereographic camera is a stereographic video camera, and

at least one of the focus distance and the focal length are varied during a video take.

24. The method for controlling a stereographic camera of claim 23 , wherein the interocular distance is varied during the video take.

25. The method for controlling a stereographic camera of claim 24 , wherein the method is performed continuously in near-real time.

26. The method for controlling a stereographic camera of claim 23 , wherein the focal length and focus distance of the lenses are set by operator actions.

27. The method for controlling a stereographic camera of claim 23 , wherein

the focal length of the lenses is set by an operator action, and

the focus distance of the lenses is set by an autofocus subsystem.

28. The method for controlling a stereographic camera of claim 12 , further comprising, for at least some of the three or more preset stereographic imaging modes:

retrieving, from the preset parameter memory, a lens aperture parameter associated with the selected stereographic imaging mode

setting respective apertures of the lenses in accordance with the lens aperture parameter.

29. The method for controlling a stereographic camera of claim 12 , further comprising, for at least some of the three or more preset stereographic imaging modes:

retrieving, from the preset parameter memory, a shutter speed parameter and/or an exposure time parameter associated with the selected stereographic imaging mode, and

operating the camera in accordance with the shutter speed parameter and/or the exposure time parameter.