Image analysis – Histogram processing – With a gray-level transformation
Patent
1997-01-08
1999-03-09
Boudreau, Leo H.
Image analysis
Histogram processing
With a gray-level transformation
382270, G06K 900
Patent
active
058811672
ABSTRACT:
A method of position recognition, includes a step of obtaining a gray image by picking up an image of an object by an image pickup device; a step of scanning the gray image by a profile scanning window composed of a plurality of gray-level detection areas which cross a scanning profile corresponding to a profile of the object on the gray image and using to measure a gray-level representative value of an inner-side gray-level detection area and a gray-level representative value of an outer-side gray-level detection area which are inside and outside of the scanning profile; a step of calculating for each gray-level detection area an absolute value of a difference between the measured gray-level representative value of an inner-side gray-level detection area and the measured gray-level representative value of an outer-side gray-level detection area, and a step of detecting a position of the profile scanning window where a number of such gray-level detection areas in which the absolute value is greater than a specified gray-level threshold value becomes a maximum, as a position of the object.
REFERENCES:
patent: 4493420 (1985-01-01), Dennis
patent: 4581762 (1986-04-01), Lapidus et al.
patent: 4618989 (1986-10-01), Tsukune et al.
patent: 4736441 (1988-04-01), Hirose et al.
patent: 4823394 (1989-04-01), Berkin et al.
patent: 4853970 (1989-08-01), Ott et al.
patent: 4907281 (1990-03-01), Hirvonen et al.
patent: 4920572 (1990-04-01), Sugita et al.
patent: 4969202 (1990-11-01), Groezinger
patent: 5115477 (1992-05-01), Groezinger
patent: 5325443 (1994-06-01), Beatty et al.
Horikami Kinji
Itsuzaki Yoshihiro
Nakao Masaya
Takano Misuzu
Boudreau Leo H.
Matsushita Electric - Industrial Co., Ltd.
Tadayon Bijan
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