Self-calibration for a catadioptric camera

Details Self-calibration for a catadioptric camera Self-calibration for a catadioptric camera

2007-05-29

2007-05-29

Tran, Thai Q. (Department: 2621)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C348S239000, C348S207990, C348S036000, C348S335000, C382S294000

Reexamination Certificate

active

11015822

ABSTRACT:
A method and a system for self-calibrating a wide field-of-view camera (such as a catadioptric camera) using a sequence of omni-directional images of a scene obtained from the camera. The present invention uses the consistency of pairwise features tracked across at least a portion of the image collection and uses these tracked features to determine unknown calibration parameters based on the characteristics of catadioptric imaging. More specifically, the self-calibration method of the present invention generates a sequence of omni-directional images representing a scene and tracks features across the image sequence. An objective function is defined in terms of the tracked features and an error metric (an image-based error metric in a preferred embodiment). The catadioptric imaging characteristics are defined by calibration parameters, and determination of optimal calibration parameters is accomplished by minimizing the objective function using an optimizing technique.

REFERENCES:
patent: 6346967 (2002-02-01), Gullichsen et al.

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