< > [Scanning Processes](..) > Structured Light
## Structured Light
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The idea behind structured light is to shine a pattern and record the resulting reflection.
By modulating the pattern in a specific way, we can fully reconstruct the shape.
Similar idea as laser line scanning, but using multiple 2D patterns.
Tutorials:
* [Siggraph Course 2009](http://mesh.brown.edu/byo3d/)
* [Notes](http://mesh.brown.edu/byo3d/notes/byo3D.pdf)
* [From Laser Lines to Structured Light](http://www.sci.utah.edu/~gerig/CS6320-S2012/Materials/CS6320-CV-S2012-StructuredLight.pdf)
* [Operating Principles of Structured Light Depth Cameras](https://www.springer.com/cda/content/document/cda_downloaddocument/9783319309712-c1.pdf?SGWID=0-0-45-1567073-p179887401), at springer, ([copy](principles_springer.pdf))
* [Rapid Shape Acquisition Using Color Structured Light and Multi-pass Dynamic Programming](http://grail.cs.washington.edu/projects/moscan/), Zhang, Curless and Seitz, 3DPVT 2002
* Build your own from [Instructables](http://www.instructables.com/id/Structured-Light-3D-Scanning/)
### Patterns
* [Pattern codification strategies in structured light systems](https://www.sciencedirect.com/science/article/pii/S0031320303003303), Salvi, Pages and Batile, Pattern Recognition 2004
* [Slides](http://www.cs.cmu.edu/afs/cs/academic/class/16823-s16/www/T3P5.pdf) from CMU 16.823
* [Compressive Structured Light for Recovering Inhomogeneous Participating Media](http://graphics.berkeley.edu/papers/Gu-CSL-2012-06/index.html), Gu, Grinspun, Belhumeur and Ramamoorthi, TPAMI 2012
### Large projector-based systems:
* [DAVID SLS](http://www.david-3d.com/en/support/david4/sls-overview)
* Acquired by [HP](http://www8.hp.com/us/en/campaign/3Dscanner/overview.html)
### Small Scanners:
* Primesense (acquired by Apple in 2013)
* [Asus Xtion](http://www.asus.com/Multimedia/Motion_%20Sensor/Xtion_PRO/)
* Kinect V1
* [Occipital Structure Sensor](http://structure.io/) (recently acquired [Paracosm](https://paracosm.io/) = Lidar)
* Intel [Realsense](https://www.intel.com/content/www/us/en/architecture-and-technology/realsense-overview.html), [new](https://click.intel.com/intelr-realsensetm-depth-camera-d435.html)
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