Generalized Image Acquisition and Analysis
Measuring BRDFs of Immersed Materials
We investigate the effect of immersing real-world materials
into media of different refractive indices. We show, that
only some materials follow the Fresnel-governed
behaviour. In reality, many materials exhibit unexpected
effects such as stronger localized highlights or a
significant increase in the glossy reflection due to
microgeometry. In this paper, we propose a new measurement
technique that allows for measuring the BRDFs of materials
that are immersed into different media.
Projects
Computational Plenoptic Imaging
Computer Graphics Forum 2011
Abstract
The plenoptic function is a ray-based model for light that includes the color spectrum as well as spatial,
temporal, and directional variation. Although digital light sensors have greatly evolved in the last years,
one fundamental limitation remains: all standard CCD and CMOS sensors integrate over the dimensions of the
plenoptic function as they convert photons into electrons; in the process, all visual information is irreversibly
lost, except for a two-dimensional, spatially-varying subset - the common photograph. In this state of the
art report, we review approaches that optically encode the dimensions of the plenpotic function transcending
those captured by traditional photography and reconstruct the recorded information computationally.
Project Page Slides Bibtex
@Article{Wetzstein11:CPI,
author = {Gordon Wetzstein, Ivo Ihrke, Douglas Lanman, and Wolfgang Heidrich},
title = {Computational Plenoptic Imaging},
journal = {Computer Graphics Forum},
volume = {30},
number = {8},
year = {2011},
pages = {2397--2426},
publisher = {Blackwell Publishing},
}
author = {Gordon Wetzstein, Ivo Ihrke, Douglas Lanman, and Wolfgang Heidrich},
title = {Computational Plenoptic Imaging},
journal = {Computer Graphics Forum},
volume = {30},
number = {8},
year = {2011},
pages = {2397--2426},
publisher = {Blackwell Publishing},
}