Targets

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Targets are physical objects in the area to be scanned that SCENE can detect and use to register the scans. A target can be a naturally occurring plane such as a wall or desk, or you can use extra objects made specifically to function as targets. These artificial targets are spheres, checkerboards, and markers.

There are several things to consider when deciding which type of targets to use.

• Since planes probably exist in the environment you are scanning, you don’t have to do anything extra to use them. But you can’t be sure that your environment will have enough planes, and you can’t document the location of the target by other means, i.e., via GPS coordinates.
• Spheres are highly accurate at any angle to the scanner and are often used in conjunction with GPS coordinates, but they are more expensive than printed targets, and can be bulky to transport.
• Both checkerboards and markers can be printed with your laser printer. They are easy to transport and replace, but they do not work if they are placed at an oblique angle to the scanner.
• Checkerboards, when scanned at right angles, can be detected at greater distances than other types of targets.
• Markers and planes can be automatically detected in scans made by both the FARO Focus Laser Scanners and FARO Handheld Scanners, so you can use one set of targets for both types of scanner.