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:
Feb. 10, 1987
Filed:
Apr. 18, 1983
Joseph Wilder, Princeton, NJ (US);
Object Recognition Systems, Inc., Princeton, NJ (US);
Abstract
Apparatus for the quality control inspection of a product (such as a computer keyboard or a printed circuit board) consisting of an array of elements (such as keys or shapes) each having at least one identifying graphic pattern. A video camera views the elements one at a time in sequence. A predetermined electronic window surrounds each graphic pattern on each element. Edge signals representing the vertical and horizontal edges of a graphic pattern on an element are derived from the video signal during scan through the window surrounding the pattern. The edge signals are transformed to data-reduced feature signals which are compared with similar signals from a prototype key to determine whether the patterns represented thereby match.