Structured light is a common tool to observe the 3D shape of objects. However, most of these sensor systems assume that the objects scatter light diffusely and that there is only a moderate amount of ambient light. They are not able to deal with specular or transparent objects or with the ambient lighting from direct sunlight. We have built a scanning laser line striper that works even in bright sunlight and is able to observe optically challenging objects. In this paper we will show how the sensor can be used to measure the 3D shape of reflective objects and objects behind a semi-transparent plane.
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