How do I prevent tracking loss?
Tracking loss is when the device does not see how two parts of a scene are connected. This leads to twisted scan results. Tracking Loss happens most often in transition areas like doorways, hallways, and small spaces.
Why does tracking loss happen?
To understand tracking loss, it is helpful to understand optical flow. Optical flow is the pattern of apparent motion of objects, surfaces, and edges in a visual scene caused by the relative motion between an observer and a scene. If you have ever been on a train or in a car, humans experience this perception issue. Everything close to us is blurred and moving fast, everything farther way is easy to observe and seems to move slowly. In tight, small spaces, the PX-80 is experiencing that same perception issue.
Ways to minimize tracking loss
Some of PX-80 users find interior scanning in enclosed spaces with a lot of turns a bit challenging.
What does the device see?
The PX-80 tracks its position based off what it has seen before. When moving into a new area, take the transition very slowly so that the device has enough opportunity to connect new things it sees to the old stuff it has already seen.
Watch your turns
It is also important to be mindful while making turns with the PX-80, especially when scanning interior spaces. If making several turns within a space, you may have drift due to tracking loss. A turn in this case is defined as moving the PX-80 in a new direction, to where it can no longer see the previous environment.
For areas with several small rooms or a network of hallways, we suggest breaking up the space into multiple scans and registers them later in your preferred point cloud software.
To be more aware we recommend always using the two-stop method when turning corners or transitioning through doorways.
Pretend you are a truck
It might seem silly but it helps. Make wide turns whenever possible. This ensure that quick pivots do not cause tracking loss and broken scans.