Printed Perforated Lampshades for Continuous Projective Images
Haisen Zhao, Lin Lu, Yuan Wei, Dani Lischinski, Andrei Sharf, Daniel, Cohen-Or, Baoquan Chen

TL;DR
This paper introduces a method for designing 3D-printed perforated lampshades that project detailed grayscale images onto walls by optimally distributing tiny tubes over the lampshade surface, balancing image quality and structural constraints.
Contribution
It presents a novel computational approach using capacity-constrained Voronoi tessellations to determine the optimal distribution and parameters of perforations for image projection.
Findings
Successfully projects continuous grayscale images onto walls.
Balances image detail with structural integrity constraints.
Provides a computational framework for designing perforated lampshades.
Abstract
We present a technique for designing 3D-printed perforated lampshades, which project continuous grayscale images onto the surrounding walls. Given the geometry of the lampshade and a target grayscale image, our method computes a distribution of tiny holes over the shell, such that the combined footprints of the light emanating through the holes form the target image on a nearby diffuse surface. Our objective is to approximate the continuous tones and the spatial detail of the target image, to the extent possible within the constraints of the fabrication process. To ensure structural integrity, there are lower bounds on the thickness of the shell, the radii of the holes, and the minimal distances between adjacent holes. Thus, the holes are realized as thin tubes distributed over the lampshade surface. The amount of light passing through a single tube may be controlled by the tube's…
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Taxonomy
TopicsOptical measurement and interference techniques · Advanced Vision and Imaging · Image Processing Techniques and Applications
