Registration Quality Report

To open the Registration Quality Report, Hover or click on the Report tile (clipboard icon) at the bottom of the screen.

Overlap: is a percentage of common features throughout the project. A higher percentage of overlap ensures that features that are shadowed or occluded behind objects in one scan (such as behind a column) are visible in one of the other scans.

Balance: shows the percentage of common features in the scan. If you were scanning a parking lot with few three-dimensional features, you could get the two surfaces to overlap with a small error, but they still might not be registered well because they could slide in relation to each other. A balance value greater than 20% indicates that this has not happened.

In practice, the ReCap engine does not require a high balance ratio - it simply needs a few good surfaces in each direction. For example, for indoor scanning, we train users to make sure that every new scan 'shares a corner' with another. Corners are very nice because these represent the intersection of three ortho-normal planes, and nearly ensure that balance will be sufficient.

Low balance usually happens when scans are too far apart to share high-quality surfaces in each direction. This is especially common in large outdoor spaces - in these cases you need to carefully inspect the space to ensure you are setting up the scanner in the right place.

Points (<6mm): shows the percentage of overlapping points within 1/4” (or 6mm) of the corresponding feature in the project. This value should be greater than 90%.

Notes: If you used targets in your scanning process, the project quality report will show more information of quality report based on the target information.

Target RMS (root mean square ): is defined as the square root of the mean square of the difference between the observation of the target in different scan and the mean position of the target in 3D world.