Method and apparatus for passive autoranging using relaxation

Details Method and apparatus for passive autoranging using relaxation Method and apparatus for passive autoranging using relaxation

1993-06-11

1994-11-15

Mancuso, Joseph

Image analysis

Histogram processing

For setting a threshold

382 41, G06K 900, G06K 936

Patent

active

053655974

ABSTRACT:
A method and apparatus for passive autoranging. Two cameras having different image parameters (e.g., focal gradients) generate two images of the same scene. A relaxation procedure is performed using the two images as inputs to generate a blur spread. The blur spread may then be used to calculate the range of at least one object in the scene. In one preferred embodiment, a temporal relaxation procedure is employed to focus a third camera. In another preferred embodiment, a spatial relaxation procedure is employed to determine the range of a plurality of objects.

REFERENCES:
patent: 4184968 (1980-01-01), Stauffer
patent: 4647193 (1987-03-01), Rosenfeld
patent: 4965444 (1990-10-01), Groud et al.
patent: 4965840 (1990-10-01), Subbarao
patent: 5148209 (1992-09-01), Subbarao
patent: 5193124 (1993-03-01), Subbarao
patent: 5231443 (1993-07-01), Subbarao
Cardillo et al. "3D Position Sensing Using a Passive Monocular Vision System" IEEE PAMI Aug. 1991, 809-813.
Pentland "A New Sense for Depth of Field" IEEE PAMI Jul. 1987, 523-531.

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