TR2001-21

Shader Lamps: Animating Real Objects With Image-Based Illumination


    •  Raskar, R.; Welch, G.; Low, K.-L.; Bandyopadhyay, D., "Shader Lamps: Animating Real Objects with Image-Based Illumination", Eurographics Workshop on Rendering (EGRW), June 2001.
      BibTeX Download PDF
      • @inproceedings{Raskar2001jun,
      • author = {Raskar, R. and Welch, G. and Low, K.-L. and Bandyopadhyay, D.},
      • title = {Shader Lamps: Animating Real Objects with Image-Based Illumination},
      • booktitle = {Eurographics Workshop on Rendering (EGRW)},
      • year = 2001,
      • month = jun,
      • url = {http://www.merl.com/publications/TR2001-21}
      • }
  • Research Areas:

    Computational Photography, Computer Vision


We describe a new paradigm for three-dimensional computer graphics, using projectors to graphically animate physical objects in the real world. The idea is to replace a physical object with its inherent color, texture, and material properties with a neutral object and projected imagery, reproducing the original (or alternative) appearance directly on the object. Because the approach is to effectively “lift†the visual properties of the ob-ject into the projector, we call the projectors shader lamps. We address the central issue of complete and continuous illumination of non-trivial physical objects using multiple projectors and present a set of new techniques that makes the process of illumination practical. We demonstrate the viability of these tech-niques through a variety of table-top applications, and describe preliminary results to reproduce life-sized virtual spaces.