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Method for road sign recognition

  • US 8,953,842 B2
  • Filed: 04/28/2011
  • Issued: 02/10/2015
  • Est. Priority Date: 05/14/2010
  • Status: Active Grant
First Claim
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1. A method for road sign recognition, in which images of a region surrounding the vehicle are acquired by a camera,image data of the camera are analyzed, wherein at least one image region that contains a potential road sign is determined,the image region that contains the potential road sign is submitted to a first classification unit that identifies the potential road sign, on the basis of at least one class-specific feature, as a road sign belonging to a particular class having the class-specific feature,characterized in thata brightness or a color intensity of a surface of the road sign is analyzed along radially extending scanning beams starting from a defined starting point within the surface of the road sign, in a brightness or color intensity analysis that comprises a one-dimensional gradient formation of brightness values or color intensity values of pixels of the image data along the scanning beams,potential contour points of an information-bearing part of the road sign are determined from results of the brightness or color intensity analysis,a limited region of the surface of the road sign is extracted as an information-bearing part of the road sign that includes all determined potential contour points, andthe extracted limited region is submitted to a second classification unit for semantic interpretation.

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