Measuring error compensation on three-dimensional scans of translucent objects

The error in three-dimensional (3-D) scans by a 3-D measurement system based upon fringe projection on translucent objects is presented. The dependencies on different material parameters are shown. A model describing the cause of the measurement error is introduced and the possibility of error compensation by shifting measurement points in a normal direction is demonstrated. (C) 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.3582858]