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Tabletop Computed Lighting for Practical Digital Photography

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6 Author(s)
Mohan, A. ; Northwestern Univ., Evanston ; Bailey, R. ; Waite, J. ; Tumblin, J.
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We apply simplified image-based lighting methods to reduce the equipment, cost, time, and specialized skills required for high-quality photographic lighting of desktop-sized static objects such as museum artifacts. We place the object and a computer-steered moving-head spotlight inside a simple foam-core enclosure and use a camera to record photos as the light scans the box interior. Optimization, guided by interactive user sketching, selects a small set of these photos whose weighted sum best matches the user-defined target sketch. Unlike previous image-based relighting efforts, our method requires only a single area light source, yet it can achieve high-resolution light positioning to avoid multiple sharp shadows. A reduced version uses only a handheld light and may be suitable for battery-powered field photography equipment that fits into a backpack.

Published in:

Visualization and Computer Graphics, IEEE Transactions on  (Volume:13 ,  Issue: 4 )