White line detection apparatus and white line detection method

摘要

A white line detection apparatus comprises extraction means (2) for extracting an image of a white line detection processing area set within a road image capturated by image-capturing means (1), maximum value estimation means (2) for estimating a maximum value among pixel values constituting an image of road surface areas other than the white line based upon the pixel values representing the image extracting by the extraction means (2), contrast reduction means (2) for reducing the contrast of an image corresponding to pixel values equal to or lower than the maximum value among the pixel values constituting the image of road surface areas other than the white line which has been estimated, and detection means (2) for detecting the white line based upon the image whose contrast has been lowered by the contrast reduction means (2).