Structured light surface scanners are usually limited to a single projector and cannot provide full profile in scan. Multiple projectors must be employed extend the imaging area over whole of imaged object. Using multiple is challenging problem due inter-projector interference which make pattern decoding hard. We describe practical approach multi-projector structured scanning based on sinusoida...

PURPOSE Acquisition of laser range scans of an organ surface has the potential to efficiently provide measurements of geometric changes to soft tissue during a surgical procedure. A laser range scanner design is reported here which has been developed to drive intraoperative updates to conventional image-guided neurosurgery systems. METHODS The scanner is optically-tracked in the operating roo...

Scarce platinum group elements (PGE) are mainly concealed in massive sulfides, and finding economically viable ore bodies largely relies on their fast chemical mapping. Most core scanners provide incomplete mineralogical contents, but none also a complete analysis including light elements. This study investigates the performance of fully automated laser-induced breakdown spectroscopy (LIBS) sca...

The purpose of this in vitro study was to assess the trueness a dental implant scanned using an intraoral high-frequency ultrasound prototype and compared with conventional optical scanners. An acrylic resin cast containing at position 11 fringe projection 3D sensor for use as reference dataset. same 10 times each group. Ultrasound scanning performed probe (42 MHz, aperture diameter 4 mm focus ...

Abstract This paper proposes a new online calibration method for the differential-drive mobile robot equipped with laser scanner. Our algorithm can jointly estimate 3-DoF extrinsic parameters of scanner and intrinsic (radii wheel spacing) kinematic model. Applying pre-integration theory initially developed IMU sensor to model, we adopt iterative nonlinear optimization minimize cost derived from...