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Carnegie Mellon Robotics Institute

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Abstract

We introduce a compact structured light device that utilizes a commercially available MEMS mirror-enabled hand-held laser projector. Without complex re-engineering, we show how to exploit the projector's high-speed MEMS mirror motion and laser light-sources to suppress ambient illumination, enabling low-cost and low-power reconstruction of outdoor scenes in sunlight. We also discuss how the line-striping acts as a kind of "light-probe", creating distinctive patterns of light scattered by different types of materials. We investigate the types of visual features that can be computed from these patterns and can reliably separate out scenes that are either diffuse (wood), translucent (wax), reflective (metal) or transparent (glass).

Keywords

structured light, 3D reconstruction

Notes

Associated Center(s) / Consortia: Vision and Autonomous Systems Center

Associated Lab(s) / Group(s): NavLab

Text Reference

Christoph Mertz, Sanjeev Jagannatha Koppal, Solomon Sia, and Srinivasa G. Narasimhan, "A low-power structured light sensor for outdoor scene reconstruction and dominant material identification," 9th IEEE International Workshop on Projector–Camera Systems, June, 2012.

BibTeX Reference

@inproceedings{Mertz_2012_7071,
   author = "Christoph Mertz and Sanjeev Jagannatha Koppal and Solomon Sia and Srinivasa G Narasimhan",
   title = "A low-power structured light sensor for outdoor scene reconstruction and dominant material identification",
   booktitle = "9th IEEE International Workshop on Projector–Camera Systems",
   month = "June",
   year = "2012",
}

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