 |
 |
 |
 |
 |
Burn Masks
3D Scanning
 |
 |
Products
 |
 |
 |
 |
Information
 |
 |
 |
 |
 |
 |
 |
 |
 |
Evaluation of 3D Scanning Volume
©2008 Total Contact - All Rights Reserved
Before data collection begins, it is important to first determine the accuracy and repeatability of a measurement system. Total Contact, tasked by NIOSH to evaluate the performance of the Cyberware WB4 scanning system, devised two methods of evaluation. A GEOmetric MANikin (GEOMAN) was designed and constructed to emulate the human subject within the scanning volume. GEOMAN is a full size (6’) manikin with articulating shoulder, hip, and knee joints to simulate various standing and seated postures.
The segments of GEOMAN are geometric objects of known dimensions that were used to evaluate surface acquired and hidden by scanning given various postures; accuracy of anthropometric measurements such as circumferences and lengths; color mapping discrepancies and possible corrections; and consistency of luminance data.
The segments of GEOMAN are geometric objects of known dimensions that were used to evaluate surface acquired and hidden by scanning given various postures; accuracy of anthropometric measurements such as circumferences and lengths; color mapping discrepancies and possible corrections; and consistency of luminance data.
To eliminate the operator’s influence on linear measurements, we also measured distances, radius values, and surface area of GEOMAN’s segments. To map the error space in the coordinates of the scanning system, Total Contact used a reduced experimental design common in the response surface methodology, called a Central Composite Design (CCD), Peak calibration device, and the Faro bronze digitizing arm to determine whether significant error exists in the 3-D coordinates of the scanning system.