NCTech iSTAR camera and the Topcon GLS-2000

NCTech iSTAR camera and the Topcon GLS-2000

One of the limitations of many terrestrial laser scanners is acquiring onboard photography that is representative of reality. This can be quite challenging and/or time consuming to achieve well – the main reasons are low resolution, poor exposure due to difficulties in obtaining accurate settings for a 360 degree scan, and the high chance of external noise in the form of traffic, inqusitive bystanders or careless scanner operatives. We have […]

Topcon GLS-2000 Field Trial Report

Topcon GLS-2000 Field Trial Report

Earlier this week we teamed up with Topcon Europe’s scanning specialists who brought their pre-production Topcon GLS-2000 laser scanner to South Wales for some field testing and feedback. Having seen the official specs at the launch in Intergeo, we were keen to test out its capabilities for real on some familiar test sites. First off we visited the Museum of Welsh Life in St. Fagans to scan St. Teilo’s Church, […]

How fast is the Topcon GLS-2000 Scanner?

How fast is the Topcon GLS-2000 Scanner?

Not an official, or recommended test by any means, but the video below gives an idea of the time it takes to do a full 360 degree scan with this instrument in high speed, 12.5mm @10m resolution (including capturing images). The video was captured using a GoPro HD Hero 3+ taped onto the front handle of the scanner. Rather than sit through the entire real time scan we’ve sped it up […]

Target Scanning with the GLS-2000

Target Scanning with the GLS-2000

As mentioned in the previous post, the Topcon GLS-2000 is a survey grade instrument that can be attached to a standard tribrach to allow occupation and backsight measurements over a known point. Previous Topcon GLS scanners used a bespoke highly reflective target that could be attached (magnetically or adhesively) to a special T mount or any flat surface. Whilst testing a production Topcon GLS-2000 laser scanner, we spotted an option under […]

Improving visual clarity of point clouds using occlusion

Improving visual clarity of point clouds using occlusion

Complex architectural scenes suffer in clarity due to points in front of and behind other data. Occlusion culling has been implemented in ScanMaster to improve visual clarity in point clouds. The image below shows a point cloud of a complex building. The aim is to examine the wall either side of the archway (viewpoint and direction annotated). With occlusion “false”, it is difficult to see foreground pounts because of may […]