Research On Spatial Information Acquisition In 3-D Body Scanning System

A 3D scanning system for the human body based on the non-contact surveying is introduced. It acquires 3D geometric information of the body surface through software treating with the body shape captured by visual equipments. The system is a high-tech product of abroad application. It can acquire automatically the coordinates and color information of the objective surface points in 3D space, build 3D models of body surface, and save the acquired data as corresponding interface files of standard data. Several key problems of the 3D scanning system for the human body are emphasized: overall technical scheme of the system, software analysis of the system, spatial information acquisition, and 3D data compressing.First, a systematical summary for the state of the art of 3D information acquisition technology at home and abroad is made. The design aim and scheme, with analysis emphasizing on the software structure of the system, of the 3D scanning system for the human body (type 3DLCS300) are then given. Each software modules of the system are summarized and detailed analysis on collection, pre-processing and acquisition of the 3D spatial information. A method of 3D surface modeling based on the idea of Visual Hull is presented. In view of a simple hardware environment, a 3D scanning system to obtain the spatial information of the human body through multiple views is described. Finally, according to the characters of the 3D data of the human body acquired from above-mentioned type 3DLCS300, a compressing method is introduced.