Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-03-31
1990-11-06
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358103, 358125, 358903, 364443, 901 47, H04N 718
Patent
active
049690361
ABSTRACT:
Determining the self-motion in space of an imaging device (e.g., a television camera) by analyzing image sequences obtained through the device. Three-dimensional self-motion is expressed as a combination of rotations about the horizontal and vertical camera axes and the direction of camera translation. The invention computes the rotational and translational components of the camera self-motion exclusively from visual information. Robust performance is achieved by determining the direction of heading (i.e., the focus of expansion) as a connected region instead of a single location on the image plane. The method can be used to determine when the direction of heading is outside the current field of view and when there is zero or very small camera translation.
REFERENCES:
patent: 4805018 (1989-02-01), Nishimura
patent: 4853775 (1989-08-01), Roovrais
patent: 4872051 (1989-10-01), Dye
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Bhanu Bir
Burger Wilhelm
Britton Howard W.
Shudy Jr. John G.
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