Keyskills: MATLAB quality standards research development visual perception programming languages Python communication skills time management PCL annotation tools 3D datasets point clouds BBox 3D semantic Instance segmentation output file formats PCD formats JSON formats text formats annotation guidelines annotation specifications quality control checks annotation workflows 3D computer vision semantic annotation 3D data structures volumetric data 3D meshes computer vision concepts semantic instance segmentation 3D annotation tools Label box Annotate360 Cloud Factory collaboration skills project deadlines 3D computer vision libraries Open3D PointNet PointNet