Trimble introduced a new generation of terrestrial laserscanners (TLS) in October 2005. It was on the one side a further development of the Mensi GS200 series and on the other hand presented as “the 3D scanner that thinks like a surveyor”. The Trimble GX was tested regarding its precision, accuracy, attitude of reflection at different coloured surfaces and materials. A specific test field was u...

Many motor learning experiments involve subjects performing a task while experiencing external force perturbations. However, it is difficult to transfer these tasks to functional magnetic resonance imaging (fMRI) studies, and much of the technology that currently exists to facilitate this is expensive to produce and difficult to use. Here, we report on the design and construction of a novel dev...

Terrestrial laser scanners and digital cameras can be considered largely complementary in their properties. Several instruments combine a laser scanner and a camera, with the laserscanner providing geometry information and the camera supplying point of surface colour. These approaches of data fusion make sub-optimal use of the complementary properties of the two devices, as they assign a master...

PURPOSE The image noise and image quality of a prototype ultra-high-resolution computed tomography (U-HRCT) scanner was evaluated and compared with those of conventional high-resolution CT (C-HRCT) scanners. MATERIALS AND METHODS This study was approved by the institutional review board. A U-HRCT scanner prototype with 0.25 mm x 4 rows and operating at 120 mAs was used. The C-HRCT images were...

Confocal microscopes achieve high spatial resolution by focusing both a light source and a detector to a single point with an objective having a high numerical aperture. In order to produce an image, it is then necessary to scan this common focal spot through the specimen, and it is often important to image the full field of view in a short time. In order to avoid vignetting, the scanning must ...

The Finnish Geodetic Institute has been developing a mobile road environment mapping system, named as ROAMER, since 2003. The vehicle-borne ROAMER system consists of a carrying platform, positioning and navigation systems, and a 3D data acquisition system. The system employed a 3D laser scanner operated in a profiling mode. The laser scanner can be mounted in several different positions to meet...