Register scans

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When importing scans into ReCap, your data may already be registered by other software.

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For unregistered data, however, ReCap provides tools to let you merge scans into one cohesive point cloud.

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This process essentially stitches your scans together into a full representation of your intended project.

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ReCap offers two types of registration:

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automatic mass registration or manual registration.

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If you opt for automatic mass registration, Recap does its best to register every scan.

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If it is unable to add a scan to the large point cloud, it creates groups.

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It is then your responsibility to register these groups, or you can choose to keep them separate.

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Once the auto-scan is complete, Recap displays the Registration Quality Report,

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with the following values for each scan:

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Overlap is a percentage of common features throughout the project.

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A higher percentage of overlap ensures that features that are shadowed or occluded behind objects in one scan

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(such as behind a column) are visible in one of the other scans.

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Balance displays the percentage of common features in the scan.

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Larger values are better.

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Low balance usually happens when scans are too far apart to share high-quality surfaces in each direction.

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Points (<6mm) shows the percentage of overlapping points within 1/4",

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or 6mm of the corresponding feature in the project.

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Ideally, this value should be greater than 90%, and if possible, closer to 100%.

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The second type of registration offers more control, as you can register manually, scan by scan.

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Manual Registration is available at any time during the registration process.

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Electing to leave the Auto-Registration compiles any registration already completed

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and allows you to finish the registration process through the standard manual workflow.

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Recap still assists you by trying to find the best fit.

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When you add a new scan, if ReCap cannot find a solution, or if the suggested solution is incorrect,

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you can add up to three points to improve the understanding of how the two scans should be positioned.

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These points do not need to be precise, just in the same area in the two scans.

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As with automatic registration, you also get access to the Registration Quality Report.

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You can also add spheres or targets to improve the accuracy of a scan.

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While spheres are not as commonly used these days, targets are still prevalent, mostly for georeferencing.

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Add targets by creating survey points to help improve the accuracy of your scan and correct problem areas.

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To do so, click a point that is known in real-world coordinates.

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For example, if you perform a GPS survey, you can add the coordinate values of these points.

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If registration completes correctly, the scan automatically merges into the main scan group and the quality report displays.