Abstract: A method for multi-scale change detection is proposed based on inter-frame edge difference.The result shows that the algorithm is robust and well sensitive to change.Snake model is used to extract the object contour.Because of blindness of Snake model,Hausdorff tracker is introduced prior to snake tracker.Snake model is used to track non-rigid deformation in object translation position indicated by Hausdorff tracker.The result of snake model is not always closed,a method of the shortest path based on distance transform is proposed.The segmentation algorithm avoids many of the complex problems associated with optical flow estimation and gray-based segmentation in the space.Experiments also demonstrate this algorithm can handle many traditional types of sequences.