Measuring method and apparatus of photographic parameter and com

Details Measuring method and apparatus of photographic parameter and com Measuring method and apparatus of photographic parameter and com

1997-04-29

2000-08-01

Couso, Yon J.

Image analysis

Image enhancement or restoration

Artifact removal or suppression

382100, G06K 940

Patent

active

060978503

ABSTRACT:
A method of measuring an unknown photographic parameter (distortion coefficient or focal length) from an image taken by a camera of which photographic parameter is unknown. An image to be measured is entered, the photographic parameter to be measured (distortion coefficient or focal length) is designated, an image region necessary for measuring the photographic parameter in the image to be measured is designated, a characteristic relating to the photographic parameter to be measured is extracted from the designated image region, and the photographic parameter is calculated according to a specified operation processing on the basis of the quantity and position of the extracted characteristic.

REFERENCES:
patent: 4603960 (1986-08-01), Zeth et al.
patent: 4783833 (1988-11-01), Kawabata et al.
patent: 5193124 (1993-03-01), Subbarao
patent: 5263097 (1993-11-01), Katz et al.
patent: 5488675 (1996-01-01), Hanna
patent: 5832139 (1998-11-01), Batterman et al.

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