Aiming to the extrusion feature from the range image
this paper presents a extraction method based on voxel connectivity and region growth. The voxel model of range image data is built with linear octree
and the searching algorithm of voxel neighbors is improved; Region growth is realized with the connectivity of seed voxel in the specific direction
then the seeds are judged and the extrusion feature data are extracted. This method is applied to liquid cabin range image data and the results of extraction are discussed.