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.

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A Theory of Plenoptic Multiplexing

Ivo Ihrke, Gordon Wetzstein, Wolfgang Heidrich
In: Proceedings of CVPR 2010 (oral).



Abstract

Multiplexing is a common technique for encoding highdimensional image data into a single, two-dimensional image. Examples of spatial multiplexing include Bayer patterns to capture color channels, and integral images to encode light fields. In the Fourier domain, optical heterodyning has been used to acquire light fields. In this paper, we develop a general theory of multiplexing the dimensions of the plenoptic function onto an image sensor. Our theory enables a principled comparison of plenoptic multiplexing schemes, including noise analysis, as well as the development of a generic reconstruction algorithm. The framework also aides in the identification and optimization of novel multiplexed imaging applications.
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Bibtex

@article{ihrke2010theory,
title={{A theory of plenoptic multiplexing}},
author={Ihrke, I. and Wetzstein, G. and Heidrich, W.},
year={2010},
publisher={IEEE}
}
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