Method and apparatus for simultaneous capture of a spherical image

• US 6,002,430 A
• Filed: 05/27/1997
• Issued: 12/14/1999
• Est. Priority Date: 01/31/1994
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Interactive Pictures Corp. (IPIX Corporation)
• Inventors: McCall, Danny A., Martin, H. Lee
• Primary Examiner(s): LEE, MICHAEL
• Application Number:
  US08/863,584
• Time in Patent Office: 931 Days
• Field of Search: 348/207, 348/222, 348/239, 348/36, 348/39, 348/47, 348/48, 348/143, 348/147, 348/37, 348/38, 382/268
• US Class Current: 348/207.99
• CPC Class Codes: H04N 23/698 for achieving an enlarged field of view, e.g. panoramic image capture

Abstract

A method and apparatus for capture of a spherical image is disclosed. The present invention includes at least one camera having a lens with at least a 180° field-of-view for capturing a hemispherical image. In a first embodiment, a second hemispherical image is created corresponding to a mirror image of the hemispherical image captured by the camera. In a second embodiment, two back-to-back cameras capture first and second hemispherical images, respectively. In both embodiments, a converter combines the two images along their outside edges to form a single, spherical image. Finally, the converter stores the complete spherical image for later retrieval and perspective corrected viewing.

Claims

1. A method for capturing a spherical image comprising the steps of capturing a first approximately hemispherical image via a first camera including a first hemispherical lens;

capturing a second approximately hemispherical image via a second camera including a second oppositely directed hemispherical lens, wherein the first and second approximately hemispherical images overlap with each other such that each of the first and second approximately hemispherical images has an overlapping portion with the other of the first and second approximately hemispherical images; and

combining said first and second oppositely directed hemispherical images to create a seamless spherical image by averaging the overlapping portions of both the first and second approximately hemispherical images.

3. The method of claim 1, wherein the step of combining includes averaging the overlapping portions of both the first and second approximately hemispherical images using weighted averaging.

4. The method of claim 1, wherein the step of combining includes averaging the overlapping portions of both the first and second images using weighted averaging.

2. An apparatus for capturing a spherical image comprising:

a first camera equipped with a first 180°

or greater field-of-view lens, said first camera and said first lens directed in a first direction, said first camera capturing a first image;

a second camera with a second 180°

or greater field-of-view lens, said second camera and said second lens directed in a second direction opposite said first direction, said first and second cameras arranged in a back-to-back position, said second camera capturing a second image, wherein the first and second images overlap with each other such that each of the first and second images has an overlapping portion with the other of the first and second images; and

a combining system for combining said first and second images into a seamless formed image by averaging the overlapping portions of both the first and second images.

5. The apparatus of claim 2, wherein the combining system is configured to combine the first and second images by averaging the overlapping portions of both the first and second images using weighted averaging.

6. A method for creating a seamless spherical image, the seamless spherical image comprising at least a first image in a first direction and a second image in a second direction different from the first direction, the method comprising the steps of:

combining at least the first and second images to create the seamless spherical image, the first and second images overlapping with each other such that each of the first and second images has an overlapping portion with the other of the first and second images, the step of combining including averaging the overlapping portions of the first and second images; and

storing the entire seamless spherical image as a single image.

7. The method of claim 6, further including the steps of:

capturing the first image; and

capturing the second image.

8. The method of claim 6, wherein the step of averaging includes averaging the overlapping portions of both the first and second images using weighted averaging.

9. The method of claim 6, wherein the step of storing includes storing the entire seamless spherical image as a single image in a memory.

10. The method of claim 6, wherein the step of combining includes creating a single, complete, and formed seamless spherical image.

11. The method of claim 6, wherein each of the first and second images is an approximately hemispherical image.

12. The method of claim 6, wherein the first image has a field of view greater than 180 degrees.

13. An apparatus for creating a seamless spherical image, the seamless spherical image comprising at least a first image in a first direction and a second image in a second direction different from the first direction, the apparatus comprising:

a processor for combining at least the first and second images to create the seamless spherical image, the first and second images overlapping with each other such that each of the first and second images has an overlapping portion with the other of the first and second images, the processor being configured to combine the first and second images by averaging the overlapping portions of the first and second images; and

a storage device for storing the entire seamless spherical image as a single image.

14. The apparatus of claim 13, wherein the processor is further configured to average the overlapping portions using weighted averaging.

15. The apparatus of claim 13, wherein the storage device is a memory.

16. The apparatus of claim 13, wherein the processor is configured to combine the first and second approximately hemispherical images into a single, complete, and formed seamless spherical image.

17. The apparatus of claim 13, wherein each of the first and second images is an approximately hemispherical image.

18. The apparatus of claim 13, wherein the first image has field of view greater than 180 degrees.