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Patent Searching and Data


Title:
POSITION DETECTING METHOD FOR LOADED ARTICLE
Document Type and Number:
Japanese Patent JPH03158715
Kind Code:
A
Abstract:
PURPOSE:To simplify the method by detecting the distance to the loaded article from the size of an image of a specific mark on the loaded article which is photographed by a camera equipped with a fixed optical system with large depth of field. CONSTITUTION:The camera 2 equipped with the wide-angle image pickup lens with the large depth of field is arranged above loaded articles 1 and the specific mark 10 is provided on the top surface of each loaded article 1. In such a case, an image of loaded articles 1 of the uppermost stage is large, that of a 2nd stage is a little smaller, and an image of a 3rd stage is much small. Namely, the size of an image of the mark 10 of each loaded article 1 in the visual field of the camera 2 varies and the image pickup magnification comes to different. Therefore, the correspondence relation between the size of the image of the mark 10 and the distance from the camera 2 to the loaded article 1 is prepared as a data table by a processor, then the distance from the camera 2 to the loaded article 1 is found from the obtained size of the mark 10 by referring to the data table to find the image pickup magnification.

Inventors:
TANIWAKI NAOHITO
KOMORI TAKAO
Application Number:
JP29708289A
Publication Date:
July 08, 1991
Filing Date:
November 15, 1989
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC WORKS LTD
International Classes:
G01C3/06; G01C3/02; G01C11/00; H04N7/18; (IPC1-7): G01C3/02; G01C11/00; H04N7/18
Domestic Patent References:
JPS6345504A1988-02-26
JP57153204B
JPS5111465A1976-01-29
JPS6247508A1987-03-02
JP62150608B