Abstract: Gaussian particle filter(GPF) can not process topology changes of curves,while geometric active contour model based on level set can well adapt to the topology changes.In order to track and extract accurate contour information of rigid and non-rigid moving objects,a moving object tracking method combining distance regularized level set evolution(DRLSE) model and GPF is proposed in this paper.Firstly,moving regions of the objects are obtained through object tracking with GPF.Then the level set regularization term is introduced to the geodesic active contour model and DRLSE is performed by taking external contour center as the basis.The distance regularization effect eliminates the need for re-initialization and avoids the corresponding numerical errors.The regularity of the level set function is maintained during the level set evolution.Finally,the obtained accurate contour information is feed back to the tracking framework.Experimental results show that the proposed method is applicable to the rigid and the non-rigid objects and tracking results are accurate in real traffic environments.