Slice'n'Swipe: Annotation of Point Clouds using Free-Hand Gestures

Inspired by the current generation of "natural user interface" technologies, we designed a set of tools for 3D point cloud annotation based on free-hand gesture input. Our techniques include a chef’s knife metaphor to cut the point cloud and swipe away unwanted parts, a resizable volumetric cursor to specify complex 3D shapes, and a lasso tool to draw a selection outline. These tools are used interchangeably through progressive refinement to allow the user to specify points of interest and annotate.