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Structured-Light 3D-Scanner

Computer-aided 3D scanning methods make it possible to digitalize complete real scenes and individual objects. These scans are used throughout many areas. For instance in games and entertainment industry (e.g. creation of 3D objects), quality management in industrial manufacturing (e.g. detection of cracks and other production defects), medicine (e.g. computer tomography (CT)) to name just a few.

Existing scanning methods are typically separated into active and passive methods. Passive methods involve taking monocular or stereoscopic photos or videos of scenes as an input, from which the spatial structure is calculated without projecting any kind of additional information into the scene (such as light patterns, marker or laser scans).

With active methods on the other hand, the scenes or the objects used for the scanning process are supplemented with additional information. These include, for example, laser scanning procedures. These methods usually provide much more precise and detailed results than passive methods, but often require somewhat expensive hardware and thus are usually only affordable on an industrial scale.

In cooperation with the RheinMain University of Applied Sciences and the company CNC-Step an application for a structured-light 3D scanner was developed. The aim of this project was to develop a scanner that is as user-friendly and production-ready as possible and that can be used to scan objects after a one-time calibration, without the need for the user to first receive a comprehensive introduction to the operation of the device.