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Increasing Laser Scanning Productivity with FARO's On-Site Registration

True North | Summer 2021

On-Site Registration (OSR) is feature of the FARO S series Laser Scanners that allows for the wireless transmission of scan data to SCENE software for real-time processing. In addition, multiple scans are registered in real time as well. The ability to process and register the scans in the field rather than having to post process in the office has the potential to generate significant time, and therefore cost savings over the course of a project.

The On-Site Registration process uses the scanner’s WLAN capability to connect to a laptop or tablet on the jobsite running the SCENE software, either using the scanner as a hotspot or through a local network. From there we can follow the conventional SCENE office workflow to import, process and register, either through our device or the scanner itself. If initialised through a network, the laptop or tablet can act as a hub on site, receiving and processing the data while the actual operation of the scanner and the On-Site Registration can be controlled via another linked device such as a Smartphone.

FARO S150+ Scanner

FARO S150+ Scanner running OSR with a Microsoft Surface Tablet, which displays simultaneously on the scanner and tablet.

Once connected we can configure the scanner through the On-Site Registration menu to perform our regular office tasks as the project demands. As in the office, the more tasks we define, the longer the process takes so while we have the ability to colorize our scans in the field and build the pointclouds, it’s often more expedient to just focus on the actual registration in the field and address our other processing tasks later. For the registration we have all the same options as using SCENE in the office such as target-based registration using Spheres or chequerboard targets, cloud to cloud and a hybrid registration technique. The speed of the connection between the scanner and the device also plays a part in the timeliness of the registration.

Processing and receiving data

If connected through a network, the laptop or tablet acts as a hub, processing and receiving the data while the OSR can also be run on another device such as a Smartphone.

Once the connection is made, the scanner has been configured for the project and the On-Site Registration is enabled we scan conventionally, as we have always done. The difference is that now, upon completion of a scan, as well as logging the data to the on-board SD card the scanner starts to stream the data to the device. Now, while we are scanning at our second location, the data from the first position is now being processed. By the time we have completed the third scan we have two processed scans that can be registered together. This process continues until we arrive at our last scan location.

Registration in Process

Registration in Process

As the registration process plays out, a map is produced showing the coverage of the individual scans and their connectivity to each other. The map is interactive allowing us to preview each scan and delete / reobserve them as required. If the registration fails, possibly because of insufficient overlap for cloud-to-cloud registration or poor visibility of a target, the On-Site Registration will give a warning prompting the user to perform another scan and reregister. In this way, the user has the confidence that the individual scans fit together as a whole and they have sufficient scan coverage for their project. Upon completion of the final scan the user now has the full project or cluster available for inspection or review and the associated registration report.

Final Registration Report

Final Registration Report

Final Registration

Final Registration

Unlike other terrestrial scanners that operate using a preregistration routine, FARO’s On-Site Registration process executes a complete and final registration without any need for additional adjustment or refinement downstream in the workflow. Therefore, what we produce in the field is the same as the conventional post processed solution and we can leave the site with full confidence that a costly return will not be required.

Stephen Vickers
3D Technical Sales Support
Cansel, Edmonton