关键词: 图像分割, 梯度, 智能车辆, 最大类间方差

Abstract: The OTSU algorithm （maximization of interclass variance） is considered as one of the superior threshold selection methods.But this method can not segment the path mark image successfully for our indigenous design and manufactured vision navigation intelligent vehicle（Cyber Car） under bright illumination.A new method based on regional Roberts gradient is proposed in order to solve this problem.The segmentation experimental results of bright path mark images show that the new method can segment the navigation path accurately and quickly.

Key words: image segmentation, gradient, intelligent vehicle, maximization of interclass variance