< > [Scanning Processes](..) > Light Stages
## Light Stages
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Light stages are light setups that allow shape from shading by capturing many different illumination of a same scene.
They allow photorealistic scanning at very high resolution.
See
* [Paul Debevec](http://www.pauldebevec.com/)
* [Light stages from Berkeley / USC](http://gl.ict.usc.edu/LightStages/)
* [The Light Stages and Their Applications to Photoreal Digital Actors](http://gl.ict.usc.edu/LightStages/SIGGRAPHAsia-2012-Debevec-LightStages.pdf), Paul Debevec, Siggraph Asia 2012
### Details
* [Acquiring reflectance and shape from continuous spherical harmonic illumination](https://dl.acm.org/citation.cfm?id=2461912.2461944), Tunwattanapong et al, TOG 2013
* Separate diffuse from specular reflectances using harmonics
* Acquires diffuse, specular, normal and roughness maps
* [Post-production facial performance relighting using reflectance transfer](https://dl.acm.org/citation.cfm?id=1276442), 2007
* Lighting manipulation using ratio image
* [Dual Light Stage](http://gl.ict.usc.edu/Research/DLS/), ESGR 2005
* Reverse setup, single laser light
* [Reflective Light Stages](http://gl.ict.usc.edu/Research/RLS/), TechReport 2006
* Simpler setup
### Prototypes
* [Lumio3D](http://s2016.siggraph.org/studio-projects.html)
* Thousands of LEDs on tiles of pcb panels
### Opposite Process
* [ZoeMatrope: A System for Physical Material Design](https://www.youtube.com/watch?v=w0ZPvTYzbsc)
* [Project](http://www.k2.t.u-tokyo.ac.jp/vision/ZoeMatrope/index-e.html)
* [Phyxel: Realistic Display of Shape and Appearance using Physical Objects with High-speed Pixelated Lighting](https://dl.acm.org/citation.cfm?id=2984548), UIST 2016
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