Abstract
Structured light illumination (SLI) is a category of techniques used to extract three‐dimensional (3D) surface information, and is widely used in both scientific and industrial applications. SLI involves the projection of a known pattern onto the surface of the target object. The 3D information is derived from triangulation between the structured pattern and the camera observing the scene. This is an active, noncontact technique of 3D data acquisition, and will be more accurate and precise than passive techniques such as stereovision or photogrammetry. The SLI process for 3D reconstruction involves a computer or processing module, a projector, and one or more cameras. Recent innovations have made SLI possible without a tethered computer, enabling work in remote or hostile environments such as underwater, or where the scanner must be carried.
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