抄録
3D models can be obtained by utilizing the structure-from-motion (SFM) technique with photographs taken from digital camera. This SFM would be exercise its power not only digital photogrammetry but also 3D model generation for 3D machining or printing, taking account of an ordinary PC is applicable. Osm-bundler and VisualSFM which have been developed as a free application software for 3D reconstruction are used in this report. Osm-bundler uses the focal length information from Exif of the images for doing point cloud generation. If the focal length information is missing, osm-bundler cannot compute. On the other hand, VisualSFM can be doing by default parameters in which the focal lengths are set to be 1.2 ×max(width, height) , although camera model is restricted than that used in osm-bundler. So, we have been photographed and reconstructed 3D models by using the digital camera, USB camera and digital micro scope. It is suggested that VisualSFM is useful to prepare 3D models for machining or printing, and also MeshLab that is a free software designed as a 3D mesh processing, is effective to edit and reconstruct the point cloud data obtained by VisualSFM. A tool-path generation of 3D face model reconstructed by MeshLab was carried out by applying PyCAM which was open source CAM software for 3D CNC milling.
