This section defines all you need to know about ZEB-CAM, how to operate, collect data and download video. FYI - we have recently updated ZEB-CAM to a new sensor. If you are still using older version of the camera, ordered prior July 2018, please see an operational guide here: ZEB-CAM prior July 2018
HINT: Before starting to scan with ZEB-CAM, it is important to pre-plan your survey. If you haven't done so already, please have a look at Scanning with Colour in Mind section on the Survey Preparation page. If you are looking for how to process the video data, please see HUB section.
Video above shows-step-by-step operation procedure for ZEB-CAM
The ZEB-CAM is a colour camera accessory for GeoSLAM’s ZEB-REVO portable laser scanner. ZEB-CAM incorporates a Hawkeye Firefly 8S action video camera. The image data collected by the camera can be viewed alongside the 3D point cloud created by the ZEB-REVO and used to extract contextual information. The operation of the camera on ZEB-CAM is independent from operation of the ZEB-REVO.
The ZEB-CAM will have pre-set parameters which work best with the REVO system. It is not recommended to change the camera settings unless you have prior knowledge in this area. If by any case they were changed, it is important to make sure that the settings are set back to the ones pre-defined below, in order to work properly with REVO system.
- Remove the ZEB handle by unscrewing the orange knurled wheel at the top of the handle.
- Fit the ZEB-CAM to the base of the REVO using the 3 x M4x8 caps screws supplied with the ZEB-CAM and tighten with the 3mm hex key. Do not over-tighten or you risk stripping the threads in the base of the REVO, just nip the screws tight.
- Refit the handle into the underside of the ZEB-CAM mount.
The camera must be started and stopped manually at the start and end of each scan. The resulting video data is logged directly to an internal microSD card in the camera. The video data from ZEB-CAM and laser data from ZEB-REVO are combined in the GeoSLAM Desktop processing application. A unique optical flow algorithm is used to determine the relative timing between the video and laser data. The viewer in GeoSLAM Desktop can be used to view the video data alongside the point cloud data from the ZEB-REVO.
It is important to keep in mind, that the ZEB-CAM is independent from the system. This means that prior to the scan, one needs to make sure that the camera battery is charged, and the SD card has enough space for the video data. After the scan, video data has to be downloaded by taking out the SD card.
ZEB-CAM Operation Check list
- Ensure the microSD card is inserted into the card slot behind the cover on the side of the camera
- Ensure there is adequate free space on the SD card.
- Ensure the camera battery is adequately charged.
- Connect the ZEB-REVO to the data logger, boot up the data logger and initiate the scan in the same way described in the ZEB-REVO User’s Manual.
- Immediately after starting the video recording [short press camera button], start the REVO rotation by pressing the button on the side of the REVO, pick up the scanner and start the scan.
- At the end of the scan, stop the REVO head rotation and immediately stop the video recording by [long pressing] the power button on top of the camera.
Downloading the data
The resulting video data is logged directly to an internal microSD card in the camera.
The scan data download is based on a connection to the datalogger (via the download cable and the USB) . But the information from ZEB-CAM is stored internally within the camera.
Therefore, the microSD must be removed from the ZEB-CAM and inserted into your machine to download the data.
Making Use of the Video Data in HUB
The processing of video data together with REVO point clouds are fully described in the Software section, GeoSLAM HUB.
When video is processed together with all other REVO data, the point cloud can be viewed together with synchronised video in the HUB Viewer giving it more context. This is where the point cloud can be colourised and more.