Patent ID: 7346190
Filing Date: 2008-03-18
Classification: G06K

Abstract:
1. A traffic line recognition device comprising: an image obtaining section for obtaining a two-dimensional road image of a road surface in front of a vehicle; an image obtaining parameter setting section for setting parameters of the image obtaining section, including dip value with respect to the road surface, and automatically updating the dip value while the vehicle is moving; a traffic line region candidate extraction section for extracting a traffic line region candidate, as a traffic line candidate, from the two-dimensional road image obtained by the image obtaining section installed on the vehicle, based on relative signal intensities of respective pixels within the road image, wherein a two-dimension/thee-dimension transform section for transforming two-dimensional image coordinates of a pixel within the traffic line region candidate to three-dimensional coordinates based on the parameters set by the image obtaining parameter setting section; a histogram production section for accumulating and projecting the three-dimensional coordinates onto a coordinate system in a direction crossing the road, and producing a histogram in the direction crossing the road; and a traffic line judgment unit for determining a traffic line based on a value of the histogram.