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US Patent 5311305 - Technique for edge/corner detection/tracking in image frames

US Patent Issued on May 10, 1994
Estimated Patent Expiration Date: Icon_subject June 30, 2012Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
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Abstract

Edges/corners in an image can be detected and tracked over time by first sampling the image at periodic time intervals, and then processing the samples to obtain the intensity value for each pixel within each image acquired at a particular time. For each pixel, the bidirectional intraframe correlation of its intensity with the intensities of pixels along each of several directions within the same image is computed. Also, the bidirectional interframe correlation of the intensity of each pixel in each image with the intensities of pixels along each of several directions spanning several images is established. The intraframe and interframe intensity correlations are processed to obtain spatiotemporal tangent information about isobrightness surfaces and curves which are indicative of edges and corners, respectively, and their image motions.

Other References

  • R. C. Bolles, H. H. Baker, and D. H. Marimont, "Epipolar-Plane Image Analysis: An Approach to Determining Structure from Motion," International Journal of Computer Vision, vol. 1, (1987), pp. 7-5

Inventors

Assignee

Application

No. 906916 filed on 06/30/1992

US Classes:

348/169, OBJECT TRACKING348/208.99, Camera image stabilization348/416.1Including motion vector

Examiners

Primary: Chin, Tommy P.
Assistant: Lee, Richard

Attorney, Agent or Firm

US Patent References

4884136, Motion detection circuit
Issued on: 11/28/1989
Inventor: Ninomiya, et al.
5018218, Confirmed boundary pattern matching
Issued on: 05/21/1991
Inventor: Peregrim, et al.
5053876, Image stabilization
Issued on: 10/01/1991
Inventor: Blissett, et al.
5153719Method of detecting horizontal movements in the picture contents of a television signal
Issued on: 10/06/1992
Inventor: Ibenthal

International Class

H04N 007/18

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