Absolute phase-assisted three-dimensional data registration for a dual-camera structured light system.
For a three-dimensional shape measurement system with a single projector and multiple cameras, registering patches from different cameras is crucial. Registration usually involves a complicated and time-consuming procedure. We propose a new method that can robustly match different patches via absolute phase without significantly increasing its cost. For y and z coordinates, the transformations from one camera to the other are approximated as third-order polynomial functions of the absolute phase. The x coordinates involve only translations and scalings. These functions are calibrated and only need to be determined once. Experiments demonstrated that the alignment error is within RMS 0.7 mm.
Zhang
Song
S
Mathematics Department, Harvard University, One Oxford Street, Cambridge, Massachusetts 02138, USA. szhang77@gmail.com
Yau
Shing-Tung
ST