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:
Aug. 16, 2016
Filed:
Oct. 24, 2014
Matrox Electronic Systems Ltd., Dorval, CA;
Arnaud Lina, Montreal, CA;
MATROX ELECTRONIC SYSTEMS LTD., Dorval, QC, CA;
Abstract
In a method and system for detecting a position of a sheet of light in an image, two parameters are used, namely the width of the widest peak to be detected and the intensity difference of the least-contrasted peak to be detected. From these two parameters, a size S, a distance D, and a threshold T are determined. A region of interest (ROI) is determined based on the intensity profile associated with a line of pixels of the image, distance D and threshold T. A derivative filter of size S is applied to the intensity profile to produce a slope of the intensity profile. In the determined ROI, one or more zero-crossings in the slope of the intensity profile are detected. From the detected zero-crossings, a zero-crossing is selected and the position of the selected zero-crossing is returned as the detected position of the sheet of light for the line of pixels.