Manufacturing Layered Attenuators for Multiple Prescribed Shadow Images

Ilya Baran, Philipp Keller, Derek Bradley, Stelian Coros, Wojciech Jarosz, Derek Nowrouzezahrai, Markus Gross
Computer Graphics Forum: Eurographics Conference (2012)

Abstract

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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BIBTEX

@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}
}
© Derek Nowrouzezahrai 2005 - 2012