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:
Nov. 27, 2001
Filed:
May. 30, 2000
Frank Blasing, Werl, DE;
Norbert Bendicks, Hemer, DE;
Leopold Kostal GmbH & Co. KG, Ludenscheid, DE;
Abstract
The invention relates to a method for detecting objects which are located on a transparent panel and which produce light reflexes when illuminated, using a detector unit containing one or more optical sensor arrays. The inventive method comprises the following steps: illuminating the panel in order to produce light reflexes in or on the objects which are located on the panel, from the side of the panel behind which the detector unit is located; image detection of an illuminated section of the panel using the detector unit by preparing two panel section images which together form an image pair, the light reflexes(es) of an object located on the transparent panel produced through illumination being located at differently-positioned image points in each of said panel section images; determining the differential image of the two images of an image pair by subtracting the contents of identically positioned image points of one panel section image from those of the other panel section image and evaluating the differential image determined in terms of the contents corresponding to the individual image points.