
| We present a practical and inexpensive method for creating physical objects that cast different color shadow images when illuminated by prescribed lighting configurations. The input to our system is a number of lighting configurations and corresponding desired shadow images. Our approach computes attenuation masks, which are then printed on transparent materials and stacked to form a single multi-layer attenuator. When illuminated with the input lighting configurations, this multi-layer attenuator casts the prescribed color shadow images. Alternatively, our method can compute layers so that their permutations produce different prescribed shadow images under fixed lighting. Each multi-layer attenuator is quick and inexpensive to produce, can generate multiple full-color shadows, and can be designed to respond to different types of natural or synthetic lighting setups. We illustrate the effectiveness of our multi-layer attenuators in simulation and in reality, with the sun as a light source. |
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| @article{baran12manufacturing, author = {Ilya Baran and Philipp Keller and Derek Bradley and Stelian Coros and Wojciech Jarosz and Derek Nowrouzezahrai and Markus Gross}, title = {Manufacturing Layered Attenuators for Multiple Prescribed Shadow Images}, journal = {Computer Graphics Forum (Proceedings of Eurographics 2012)}, volume = {31}, number = {2}, year = {2012}, month = may, note = {accepted for publication}, optpages = {XX–XX} } |