Into the process of documentation of archaeological movable monuments was recently incorporated method of 3D scanning. The stable form of digital documentation is created disposes of dense spatial information about model surface. This documentation method features high spatial precission, which may allow further use (creating 3D replicas with 3D printers, morphometrical statistics of shape of interest, presentation movies etc.). For documentation was used 3D scanner MicroScribe 3D G2X with extension allowing fast data collection using laser beam (for detailed technical documentation here). The configuration enables maximal resolution on 0,23 mm with action radius of arm total 1,27 m. The principle of scanning is based on stereoscopical spatial data collection of laser on the surface of scanned object (roughly 26 thousands points per second) due to know position of laser emitor in the space (through joints of scanner arm). Object up to dimensions of 30 x 30 x 30 cm can be scanned at once without changing its position and further on merging individual meshes.
For collecting and postprocessing of spatial data was used software Micro Scan Tools, which is supplied directly for the use with the scanning device MicroScribe 3D G2X with extension Micro Scann 3D. The software enables real-time seamless data collection, extraction of point cloud, its filtering and adjustment and mesh interpolation of 3D surface of scanned object. In the first phase of the process a point cloud is acquired which is based on one or more scanns according to the size of the object. The primary data usually contain some amount of inaccuracy resulting from small fraction of wrong readings. Using various software filters and automated tools of the software Micro Scann Tools it is neccesary dato futher precise. After removing all imperfections the pointcloud is calculated into triangular mesh, which is further filtered according to required precission and resolution due to various purposes of 3D models. Resulting model can exported through various formats into respective software solutions for advanced animation rendering (e. g. 3D Studio Max, Maya, Blender, Google SketchUp etc.) for further presentation purposes. Using image and procedural textures can such lifelike objects enrich environment of more complex modeled 3D presentaions.
Example of visualization of a 3D scann of knee broach (Kniefibel) from Hradisko at Mušov.