Generalized Image Acquisition and Analysis
Maximum Mipmaps for Fast, Accurate, and Scalable Dynamic Height Field Rendering
This paper presents a GPU-based, fast, and accurate dynamic height field rendering technique that scales well to large scale height fields. Current real-time rendering algorithms for dynamic height fields employ approximate ray-height field intersection methods, whereas accurate algorithms require pre-computation in the order of seconds to minutes and are thus not suitable for dynamic height field rendering. We alleviate this problem by using maximum mipmaps, a hierarchical data structure supporting accurate and efficient rendering while simultaneously lowering the pre-computation costs to negligible levels. Furthermore, maximum mipmaps allow for view-dependent level-of-detail rendering. In combination with hierarchical ray-stepping this results in an efficient intersection algorithm for large scale height fields.
Projects
On Plenoptic Multiplexing and Reconstruction
In: International Journal of Computer Vision (IJCV).
Abstract
Photography has been striving to capture an ever increasing
amount of visual information in a single image. Digital
sensors, however, are limited to recording a small subset of
the desired information at each pixel. A common approach to
overcoming the limitations of sensing hardware is the optical
multiplexing of high-dimensional data into a photograph. While
this is a well-studied topic for imaging with color filter
arrays, we develop a mathematical framework that generalizes
multiplexed imaging to all dimensions of the plenoptic
function. This framework unifies a wide variety of existing
approaches to analyze and reconstruct multiplexed data in
either the spatial or the frequency domain. We demonstrate
many practical applications of our framework including
high-quality light field reconstruction, the first comparative
noise analysis of light field attenuation masks, and an
analysis of aliasing in multiplexing applications.
Project Page Bibtex
@article{Wetzstein:PlenopticMultiplexing:2012,
title={{On Plenoptic Multiplexing and Reconstruction}},
author={Gordon Wetzstein and Ivo Ihrke and Wolfgang Heidrich},
year={2013},
volume = 101,
number = 2,
year = {2013},
pages = {384--400},
}
title={{On Plenoptic Multiplexing and Reconstruction}},
author={Gordon Wetzstein and Ivo Ihrke and Wolfgang Heidrich},
year={2013},
volume = 101,
number = 2,
year = {2013},
pages = {384--400},
}