3D Scanning and Analysis

3D scanning is the technique used to virtually collect geometric features of a physical object using non-contact measurement. The WLCC team has developed capabilities in three dimensional scanning documentation and analysis of an array of objects using structured light scanning, laser scanning and stereo photogrammetry. The team at the WLCC is utilizing this state of the art technology as part of the process to document, conserve, and study not only heritage objects and sites, but other fields and disciplines utilizing 3d scanning, such as; automotive and aerospace engineering.

Lantern3d scan of the lantern found in the H.L. Hunley 
Left to Right – Color polygonal reconstruction, lens rectification phase, lens analysis.

The primary instrument in our toolbox is the Breuckmann OptoTOP-HE scanner. This device uses structured-light scanning technology which is designed for surface scanning and 3D topography, recording the texture, color, and dimension of the object. Two cameras positioned like eyes give the machine binocular disparity creating depth perception. It offers highly accurate measurements of surfaces, designed for documentation, study, analysis and reconstruction of an object or a site.

Breuckmann OptoTOP-HE , courtesy Breuckmann Gmbh  

The process that the virtual reconstruction/metrology team at WLCC uses is broken into 3 categories:

3D Scanning: Capturing 3D data from an existing object using a white light scanner (Close Range Scanning, Large/Small Object Scanning)

Digital Modeling: Replicate and computerize physical objects (Polygonal Models, NURBS, all files can be exported to suit the end users 3D visualization platform)

Inspection/Analysis: Using advanced measurement techniques, scanned objects can be analyzed in a number of ways (3D Scan to Original Model Inspection, Scanned/Digitized Object to 2D Drawing, or Scanned/Digitized Object to Scanned/Digitized Object)

Structured Light Scanning

Click on the images below to enlarge.

Laser scan of Ft. Sumter - WLCC Courtesy

Collecting laser scan data at Fort Sumter using the Trimble GX Scanner. The project was completed in partnership with NPS and the Clemson University Department of Civil Engineering. 

– WLCC Courtesy

3D reconstruction of Ft. Sumter – WLCC Courtesy

Reconstruction phase of the structured analysis project. Key points are harvested from the 3d data to determine possible areas of damage.

– WLCC Courtesy

Dimensional analysis of pre and post conservation cork - WLCC Courtesy

3d comparison of pre and post conservation corks from the 1565 wreck San Juan discovered in Red Bay, Labrador, Canada. Using PolyWorks the shape deformation can be determined and used to advise Parks Canada in the conservation process.

– WLCC Courtesy

Dimensional analysis of pre and post conservation cork - WLCC Courtesy

3d comparison of pre and post conservation corks from the 1565 wreck San Juan discovered in Red Bay, Labrador, Canada. Using PolyWorks the shape deformation can be determined and used to advise Parks Canada in the conservation process.

– WLCC Courtesy