Camera for generating a stereoscopic pair of images

• US 20030151659A1
• Filed: 02/06/2003
• Published: 08/14/2003
• Est. Priority Date: 02/13/2002
• Status: Abandoned Application

• Current Assignee: Pentax Corporation (Hoya Corporation)
• Original Assignee: Pentax Corporation (Hoya Corporation)
• Inventors: Masuda, Toshio, Kawano, Kiyoshi
• Application Number:
  US10/358,884
• Publication Number:
  US 20030151659A1
• Time in Patent Office: Days
• US Class Current: 348/42
• CPC Class Codes: G03B 35/02 by sequential recording
• CPC Class Codes: H04N 13/211 using temporal multiplexing
• CPC Class Codes: H04N 13/221 using the relative movement between cameras and objects
• CPC Class Codes: H04N 13/246 Calibration of cameras
• CPC Class Codes: H04N 13/296 Synchronisation thereof; Control thereof

Abstract

The digital camera is adapted to generates a stereoscopic pair of images from a first image taken from a first camera location and a second image taken from a second camera location. The digital camera includes an imaging device for capturing an image of the object to be taken, an optical system for forming an optical image of the object and a processor for controlling the digital camera. The processor determines a distance from the digital camera to the object, or object distance, from the position of a focusing lens of the optical system. The processor further calculates a distance for which the digital camera should be moved after the first image is taken to be located at the second camera location. The distance for which the digital camera should be moved is displayed on an LCD monitor to inform the user of the digital camera.

Claims

1. A camera for generating a stereoscopic pair of images by taking first and second images of an object in sequence, said camera comprising:

an object distance detector that detects an object distance, said object distance being a distance from said camera to the object at the time of taking said first image;

a displacing distance determiner that determines a distance for which said camera should be laterally displaced between first and second shoots for taking said first and second images, respectively, said distance being determined based on said object distance; and

a display unit that displays a guide information, said guide information including at least said distance for which said camera should be displaced.

2. The camera according to claim 1, wherein said guide information further includes a mark indicating the direction in which said camera should be displaced.

3. The camera according to claim 1, wherein said distance determiner determines said distance for which said camera should be displaced within a range of {fraction (1/30)} to {fraction (1/60)} of said object distance.

4. The camera according to claim 1, further comprising:

an optical system for forming an optical image of the object, said optical system having a focusing lens movable along an optical axis thereof; and

wherein said object distance detector detects said object distance based on the position of said focusing lens at the time when said optical system is focused on the object.

5. The camera according to claim 4, further comprising:

a memory, a lookup table being stored in said memory, said lookup table providing the relation between the position of said focusing lens and the object distance,

wherein said object distance detector determines said object distance by making reference to said lookup table.

6. The camera according to claim 1, wherein said display unit is also utilized to display an image currently captured by said camera for allowing framing of said first and second images.

7. The camera according to claim 1, further comprising:

a switch that is to be operated to confirm that a user has seen said guide information displayed by said display unit, and

wherein said display unit terminates displaying said guide information when said switch is operated.

8. A digital camera for generating a stereoscopic pair of images, said stereoscopic pair of images including a first image taken from a first camera location and a second image taken from a second camera location laterally displaced from said first camera location, said digital camera comprising:

an imaging device that captures said first and second images of the object; and

a display unit that displays the image currently captured by said imaging device to allow framing of the first and second images,

wherein said display unit further displays a guide information including the distance between said first and second camera locations.

9. The digital camera according to claim 8, wherein said guide information further includes a mark indicating the direction in which said digital camera should be moved after said first image is taken to be located at said second camera location.

10. The digital camera according to claim 8, wherein said guide information is displayed after a first shoot for taking said first image and before a second shoot for taking said second image.

11. The digital camera according to claim 8, further comprising a processor that determines the distance between said first and second camera locations based on an object distance at the time of taking said first image.

12. The digital camera according to claim 11, further comprising:

a lens system that forms an optical image of the object on said imaging device, said lens system including a focusing lens movable along an optical axis thereof,

wherein said processor determines said object distance from the position of said focusing lens along said optical axis at the time of taking said first image.

13. The digital camera according to claim 12, further comprising:

a memory, a lookup table being stored in said memory, said lookup table providing the relation between the focusing lens position and the object distance,

wherein said processor determines said object distance by making reference to said lookup table.

14. The camera system according to claim 8, further comprising:

a switch that is to be operated to confirm that a user has seen said guide information displayed by said display unit, and

wherein said display unit terminates displaying said guide information when said switch is operated.