artescan - digitalização tridimensional

Our Combined Terrestrial Imaging System has been developed through the integration of a laser scanner and digital cameras plus several software packages for processing 3D radiometric and geometric information.

The technology used by Artescan sees the fusion of positional information, gathered by 3D laser scanning, and the semantic information collected by photogrammetry to achieve a high metric accuracy and spatially continuous surveys of complex objects, areas and surfaces.

The large number of laser collected (x,y,z) points, the so-called 3D point clouds, integrating high-resolution RGB imagery, are the new standard for geometry + dimension + texture survey.

Our system allows millimeter to centimeter accuracy (depending on the optical properties of the reflecting surface) and high resolution semantic information on the variations of surfaces’ texture and color.

3D Laser scanning brings a high level of detail, accuracy and geometric/dimension information to any survey, especially in complex contexts, and does so simply, quickly and cost-effectively. The 3D coordinated point acquisition rate is approximately tens of thousands per second.

The scan from each station takes between 2 and 10 minutes, depending on the resolution desired for the survey. The combination of results from multiple scanning positions allows the whole object to be covered, aiming at continuous survey data in a unique 3D point cloud.

Photogrammetry is the science to derive 3D object information from a set of photographs.

Each image can be seen as an instantaneous recording of thousands of spatial directions. By combining two or more images, and thus intersecting the bundles of spatial rays, the coordinates of object points, their quality, the positions of the camera, its orientations and the distortions introduced by the lenses can be calculated.

Monoscopic Photogrammetry uses convergent photographs that can be taken from a hand-held camera, making it easier, more flexible and more cost-effective for Close-Range Photogrammetry, than the more traditional stereoscopic methods, widely used for Aero-Photogrammetry.

A set of specialized software packages integrates all recorded data, point clouds and spatially oriented high resolution photographic imagery, which are combined within the same arbitrary or geo-referenced coordinate system, local or global.

We can provide 3D modeling of complex three-dimensional reality, integrating information from multiple data sources including remote sensing satellite imagery, LIDAR, existing cartography, differential GPS data, bathymetry, GIS, data bases, Google Earth, etc.

We use CAD software with the best 3D modeling tools and precision, which combines links between the modeled objects and information systems, as organized data bases and produces animations or virtual reality.

One can therefore produce a three-dimensional model from which profiles, cross-sections, previews, plans, areas, volumes and other conventional engineering documents can be automatically generated, by us or the customer.

We have been providing a wide variety of products according to project needs:

• CAD 3D or 2D models and drawings in DXF, DWG or DGN for Autocad, Microstation, GIS and other compatible software;
• Enginnering documents, namely "as – built" plans, profiles and sections, topographic plans, detailed areas and volumes calculations;
• 3D point clouds and viewer for measuring and analyzing;
• regular 3D point grids in ASCII TXT, CSV or XML format for other processing software, like Autodesk Land Cad, Golden Software Surfer and others;
• processed files in STL, OBJ, VRML or SKP for different 3D animation and visualization software, like 3D Studio Max or Google Earth;
• 3D animation videos and clips in AVI and WMV formats;
• 3D PDF animated and interactive files for Acrobat Reader v.7 or later versions;
• high resolution terrestrial metric ortho-imagery in BMP, TIFF or JPG formats linked with a DWG or DGN file where the image dimensions and positioning information allows its optimum use.
• 360º panorama imagery of high resolution, reaching hundreds of Mega pixel in a unique combined image;
• Big scale thematic maps, identifying geologic risk areas or pathologies of natural or built materials.