Fluorescent Immersion Range Scanning
The quality of a 3D range scan should not depend on the surface
properties of the object. Most active range scanning techniques,
however, assume a diffuse reflector to allow for a robust detection
of incident light patterns. In our approach we embed the object into
a fluorescent liquid. By analyzing the light rays that become visible
due to fluorescence rather than analyzing their reflections off the
surface, we can detect the intersection points between the projected
laser sheet and the object surface for a wide range of different materials. For transparent objects we can even directly depict a slice
through the object in just one image by matching its refractive index
to the one of the embedding liquid. This enables a direct sampling
of the object geometry without the need for computational reconstruction. This way, a high-resolution 3D volume can be assembled
simply by sweeping a laser plane through the object. We demonstrate the effectiveness of our light sheet range scanning approach
on a set of objects manufactured from a variety of materials and
material mixes, including dark, translucent and transparent objects.
Projects
Matthias Hullin, Ramesh Raskar, Hans-Peter Seidel, Hendrik P. A. Lensch, Ivo Ihrke
In: Proceedings of EUROGRAPHICS 2011.
Go to project listIn: Proceedings of EUROGRAPHICS 2011.
Abstract
This paper deals with the challenge of physically displaying reflectance, i.e., the appearance of a surface and its variation with the observer position and the illuminating environment. This is commonly described by the bidirectional reflectance distribution function (BRDF). We provide a catalogue of criteria for the display of BRDFs, and sketch a few orthogonal approaches to solving the problem in an optically passive way. Our specific implementation is based on a liquid surface, on which we excite waves in order to achieve a varying degree of anisotropic roughness. The resulting probability density function of the surface normal is shown to follow a Gaussian distribution similar to most established BRDF models.
Project Page Bibtex
@INPROCEEDINGS{HullinEG2011,
AUTHOR = {Hullin, Matthias B. and Lensch, Hendrik P. A. and Raskar, Ramesh and Seidel, Hans-Peter and Ihrke, Ivo},
EDITOR = {Deussen, Oliver and Chen, Min},
TITLE = {Dynamic Display of {BRDFs}},
BOOKTITLE = {Computer Graphics Forum (Proc. EUROGRAPHICS)},
ORGANIZATION = {Eurographics},
PADDRESS = {Oxford, UK},
ADDRESS = {Llandudno, UK},
PUBLISHER = {Blackwell},
YEAR = {2011},
PAGES = {475--483},
}
AUTHOR = {Hullin, Matthias B. and Lensch, Hendrik P. A. and Raskar, Ramesh and Seidel, Hans-Peter and Ihrke, Ivo},
EDITOR = {Deussen, Oliver and Chen, Min},
TITLE = {Dynamic Display of {BRDFs}},
BOOKTITLE = {Computer Graphics Forum (Proc. EUROGRAPHICS)},
ORGANIZATION = {Eurographics},
PADDRESS = {Oxford, UK},
ADDRESS = {Llandudno, UK},
PUBLISHER = {Blackwell},
YEAR = {2011},
PAGES = {475--483},
}