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US 2006/0215031 A1Published application
Method and system for camera autocalibration
AssigneeGE Security, Inc.
InventorsNils Krahnstoever, Paulo Mendonca, Jens Rittscher, Thomas Sebastian, Peter Tu
Life of this patent
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Abstract
A method for calibrating a projective camera is provided. The method includes acquiring information by detecting at least one object on a substantially flat ground plane within a field of view. A projective camera calibration is performed. A measurement uncertainty is considered to yield a plurality of camera parameters from the projective camera calibration.
Claims20
A method for calibrating a projective camera, said method comprising:
- acquiring information by detecting at least one object on a substantially flat ground plane within a field of view;
- performing a projective camera calibration;
- considering a measurement uncertainty;
- and
- yielding a plurality of camera parameters from the projective camera calibration.
2 more elements
A method for calibrating a projective camera, said method comprising:
- acquiring image data by detecting at least one object on a ground plane within a field of view;
- determining a foot-to-head homography;
- recovering a projective camera matrix for the projective camera.
A surveillance system comprising:
- an object detector configured to process a video stream and report a rectangular foreground region;
- and
- a processor configured to process the reported foreground region to extract a foot location estimate on a ground plane and a corresponding head location estimate, perform a projective camera calibration and yield a plurality of camera parameters from the projective camera calibration.
Dependencies are inferred from the claim text.