Machine Vision: Optical Digitization of Free-Form, Complex Surfaces Using the Projection of Structured Light

The use of optical sensors to evaluate threedimensional shapes plays an increasingly important role in a number of applications. One important advantage of optical sensors is that no contact is required with the object being measured; another is that they are significantly faster than contact probes. Typical industrial applications for optical sensors are production quality control, both in the micro and the macro ranges, the digitization of freeshape surfaces in reverse engineering, and a number of 3-D computer vision problems. Examples of the latter are object manipulation by means of robots and obstacle detection for robotic vehicles. New areas in which optical sensors have been successfully introduced include the measurement and preservation of antiquities, and 3-D virtual reality entertainment products.

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