Non-overlap region based automatic global alignment for ring camera image mosaic

• US 7,961,936 B2
• Filed: 03/30/2007
• Issued: 06/14/2011
• Est. Priority Date: 03/30/2007
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Xiao, Xiao, Liang, Luhong, Deutsch, Steve W., Jia, Ying
• Primary Examiner(s): Werner; Brian P
• Application Number:
  US11/694,778
• Publication Number:
  US 20080240612A1
• Time in Patent Office: 1,537 Days
• Field of Search: None
• US Class Current: 382/154
• CPC Class Codes: G06T 2207/10021 Stereoscopic video; Stereoscopic image sequence
• CPC Class Codes: G06T 2207/30208 Marker matrix
• CPC Class Codes: G06T 7/85 Stereo camera calibration

Abstract

Various embodiments are directed to non-overlap region based automatic global alignment for ring camera image mosaic. The non-overlap region based homography calculation may be based on feature points of a planar target appearing in a non-overlap region among images captured by a multi-camera based video capture device. Other embodiments are described and claimed.

Claims

1. A media processing system comprising:

a logic device;

a non-overlap region based homography calculation module executing on the logic device to calculate homography based on feature points of one planar target appearing in a non-overlap region among images captured by a multi-camera based video capture device; and

an automatic checker pattern corner localization module to automatically obtain the feature points and corresponding indices for homography calculation, identify corners and number indices in an incomplete planar target, calculate a convex polygon of current corners and obtain polygon vertices, identify upper- and lower-most corners of a column by analyzing points in the polygon vertices, identify other corners in the column with upper- and lower-most corners, and identify remaining corners in other columns by location estimation.

2. The media processing system of claim 1, the non-overlap region based homography calculation module to calculate homography between a target plane and a first image plane, calculate homography between the target plane and a second image plane, and calculate homography between the first image plane and the second image plane.

3. The media processing system of claim 1, the multi-camera based video capture device having a left field of view and a right field of view including an overlap region and the non-overlap region of the planar target.

4. The media processing system of claim 1, further comprising an image stitch module to create a panoramic image based on the homography.

5. A mobile system comprising an antenna coupled to the media processing system of claim 1.

6. A method comprising:

calculating homography based on feature points of one planar target appearing in a non-overlap region among images captured by a multi-camera based video capture device;

creating a panoramic image based on the homography;

automatically obtaining the feature points and corresponding indices for homography calculation;

identifying corners and number indices in an incomplete planar target;

calculating a convex polygon of current corners;

obtaining polygon vertices;

identifying upper- and lower-most corners of a column by analyzing points in the polygon vertices;

identifying other corners in the column with upper- and lower-most corners; and

identifying remaining corners in other columns by location estimation.

7. The method of claim 6, comprising:

calculating homography between a target plane and a first image plane;

calculating homography between the target plane and a second image plane; and

calculating homography between the first image plane and the second image plane.

8. An article of manufacture comprising a non-transitory computer-readable storage medium containing instructions that if executed enable a computing system to perform the method of claim 6.