Electronic method and apparatus for stereoscopic photography

• US 4,956,705 A
• Filed: 03/10/1989
• Issued: 09/11/1990
• Est. Priority Date: 03/10/1989
• Status: Expired due to Fees

• Current Assignee: Kaemmlein HANS J Acting As Agent For Investors
• Original Assignee: Dimensional Visions Group
• Inventors: Wright, Douglas
• Primary Examiner(s): Britton, Howard W.
• Application Number:
  US07/321,921
• Time in Patent Office: 550 Days
• Field of Search: 358/88, 358/3, 358/225, 358/229, 354/112
• US Class Current: 348/50
• CPC Class Codes: H04N 1/00201 Creation of a lenticular or stereo hardcopy image
• CPC Class Codes: H04N 1/23 Reproducing arrangements
• CPC Class Codes: H04N 13/189 Recording image signals; Reproducing recorded image signals
• CPC Class Codes: H04N 13/214 using spectral multiplexing
• CPC Class Codes: H04N 13/221 using the relative movement between cameras and objects
• CPC Class Codes: H04N 13/243 using three or more 2D image sensors
• CPC Class Codes: H04N 13/296 Synchronisation thereof; Control thereof
• CPC Class Codes: H04N 13/334 using spectral multiplexing

Abstract

A method and apparatus for electronically taking photographs of an object to be used for stereoscopic (three dimensional) reproductions of the object in which an electronic camera takes a plurality of electronic photographs of an object from each of a plurality of predetermined spaced positions relative to the object. The photographic image is converted into a video signal which is digitized and the digitized video signals of the images from the plurality of positions are utilized to produce a viewable representation of the object. In a preferred embodiment, the camera has a generally planar element for converting the image into the video signal and the planar converting element of the camera at each position is held in a common plane and the lens system for the camera at each position is kept in a plane generally parallel to the converting element plane and shifted relative to the image converting element of the camera to compensate for the different positions to have the same field of view at each position.

Claims

1. Apparatus for electronically producing a stereoscopic photograph of an object comprising:

electronic camera means having means for converting the received object of an image into an electrical video signal,

optical means for establishing a field of view relative to the object being photographed to image on said electronic camera converting means,

means for operating said electronic camera means and said optical means relative to each other to produce the same field of view of the object being photographed with the camera means located at each of plurality of predetermined positions which are spaced from each other and the image plane of the converting means being substantially parallel to the field of view object plane at each of said positions,

means for digitizing each said video signal corresponding to each image, and

means responsive to the plurality of digitized video signals for producing a viewable output corresponding to the plurality of photographs taken by said camera means.

2. Apparatus as in claim 1, wherein said operating means is responsive to the video signals produced by the converting means.

3. Apparatus as in claim 1 wherein said means for producing a viewable output comprises a monitor on which said plurality of digitized video signals are displayed.

4. Apparatus as in claim 1 wherein said means for producing a viewable output comprises projector means.

5. Apparatus as in claim 1 wherein said means for producing a viewable output comprises means for producing a photographic negative of each the digitized video signal corresponding to each image.

6. Apparatus as in claim 1 wherein said means for producing a viewable output comprises means for producing at least one plate for a printing press directly from said digitized video signals.

7. Apparatus as in claim 1 wherein said means for digitizing further comprises means for varying the characteristics of the digitized signal.

8. Apparatus as in claim 1 further comprising means for storing each of said digitized video signals.

9. Apparatus as in claim 8 further comprising means for storing each of said video signals prior to the digitizing thereof.

10. Apparatus as in claim 1 further comprising means for viewing the video signal corresponding to an image prior to it being digitized, and means for adjusting the camera means to adjust the video signal.

11. Apparatus as in claim 10 wherein said operating means comprising means for setting said optical means for the image to have a predetermined depth of field and field of view of the object relative to said converting means.

12. Apparatus as in claim 11 wherein said adjusting means further comprises means for adjusting the electrical video signal characteristics.

13. Apparatus as in claim 1 wherein said camera means further comprises a lens having an optical center and wherein said converting means of a camera comprises generally planar means,

means for mounting the generally planar converting means of the camera in a common first plane at each of said locations,

and said utilization means including means for shifting the optical center of the lens in a plane substantially parallel to the plane of the converting means at each position to compensate for the difference in position of said electronic camera means relative to said object at each said photograph taking position.

14. Apparatus as in claim 13 wherein said lens shifting means shifts the optical center of the lens at each position of the electronic camera means to be on the same focus point of the object.

15. Apparatus as in claim 13 wherein said lens shifting means shifts the lens to have the same field of view at each position of said electronic camera means.

16. Apparatus as in claim 13 wherein said lens is in a common plane which is parallel to said first plane at all said positions.

17. Apparatus as in claim 13 wherein said means for maintaining the camera converting means plane in the common first plane comprises an elongated rigid frame means, said camera means being positioned along said frame means at each said position.

18. Apparatus as in claim 17 wherein there is a single electronic camera means which is positioned along said frame means to establish each of said positions.

19. Apparatus as in claim 17 further comprising a plurality of camera means respectively positioned along said frame means to establish said plurality of positions.

20. Apparatus as in claim 13 wherein said lens shifting means comprises means for shifting the lens relative to the camera and its converting means.

21. Apparatus as in claim 20 wherein said camera means includes a camera body and said lens shifting means comprises a flexible light tight housing having one end attached to said camera body, said lens being attached to the other end of the light tight housing, and means for moving said lens relative to said camera body.

22. Apparatus as in claim 21 further comprising means for moving said camera body.

23. A method of electronically photographing an object for producing a three dimensional photograph of said object comprising the steps of

providing an electronic camera having an element for converting a received image of the object photographed into an electronic video signal,

taking a photograph of said object using substantially the same field of view with said camera at each of a plurality of predetermined positions spaced at a distance from each other,

digitizing the video signals produced by said converting means at each said location, and

utilizing the plurality of digitized video signals to produce a viewable output.

24. A method according to claim 23 wherein the step of digitizing said video signals further comprises modifying the characteristics of the digitized signal.

25. A method according to claim 23 further comprising the step of storing the video signal corresponding to each photograph prior to digitizing.

26. A method according to claim 23 further comprising the step of storing the plurality of digitized video signals.

27. A method according to claim 23 wherein the step of providing an electronic camera further comprises providing a camera with an optical lens, and further comprising the steps of

viewing said digitized video signals on a monitor and

adjusting said lens system to control the field of view and focal length of the lens.

28. A method as in claim 27 wherein the step of adjusting is carried out to make the extremities of the field of view of the lens the same at each camera position.

29. A method as in claim 23 wherein the step of providing an electronic camera further comprises providing a lens system for said camera and placing the camera converting element in a plane,

and the step of taking a photograph at each position

30. A method as in claim 29 wherein the step of shifting the optical center of the lens comprises moving the lens relative to the camera.

31. A method as in claim 29 wherein the optical center of the lens is in a common plane at each said camera position.

32. A method as in claim 29, wherein the optical center of the lens at each position of the camera is on the same focus point of the object.

33. A method as in claim 32 wherein the extremities of the field of view of the lens at each said position is the same

34. A method as in claim 32 wherein the optical center of the lens is in a common plane at each said camera position.