Lane marking detection system with improved detection power

摘要

In a road marking detection system records an image pickup element a roads image in front of a vehicle. The roads image contains a plurality of color image light components, which individually are extracted therefrom. A selector element color groups are composed of at least one extracted from the left and right regions of the roads image in front of the vehicle and a color group selected from the extracted color groups are composed of. The color are made of one or more combinations of at least one of the plurality of color image light components. The selected a color group has a position in the at least one, under the left field and the right region with a contrast, which is equal to or is higher than a threshold value. The position of the selected color group under the extracted color is attached to the next to a boundary between the left and right areas.