The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 1979
Filed:
Jan. 26, 1977
Applicant:
Inventors:
Shozo Kadota, Hachioji, JP;
Yoshiji Fujimoto, Hachioji, JP;
Assignee:
Hitachi, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
3401 / ; 3401 / ;
Abstract
Disclosed is a device for detecting a displacement between patterns comprising a picking-up device, first and second memory means for storing a first and a second patterns picked up by said picking up device, means for shifting said first and second patterns relative to each other thereby obtaining a correlation value for each shift between them, means for obtaining a maximum correlation value and deriving a displacement in terms of the number of shifts which gives said maximum correlation value.