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. 10, 2015
Filed:
Jul. 01, 2014
Kapsch Trafficcom Ab, Jönköping, SE;
Björn Crona, Jönköping, SE;
Kapsch TrafficCom AB, Jönköping, SE;
Abstract
A method for shadow detection in an image comprising multiple color channels is disclosed wherein said image is compared with a background image. Said image and said background image comprises the same multiple color channels, have an exposure of a common background and are divided into a plurality of corresponding evaluation areas. For each combination of two color channels, a shadow region is defined in the two-dimensional coordinate system spanned by the two color channels. For each image evaluation area to be evaluated and for each combination of two color channels, the method comprises checking if a difference value between a first value pair defining values of said two color channels in the image evaluation area and a second value pair defining the values of said two color channels in the corresponding background evaluation area falls within said shadow region in said coordinate system.