Efficient Monte Carlo Rendering with Realistic Lenses
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Date
2014
Authors
Journal Title
Journal ISSN
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Publisher
The Eurographics Association and John Wiley and Sons Ltd.
Abstract
In this paper we present a novel approach to simulate image formation for a wide range of real world lenses in the Monte Carlo ray tracing framework. Our approach sidesteps the overhead of tracing rays through a system of lenses and requires no tabulation. To this end we first improve the precision of polynomial optics to closely match ground-truth ray tracing. Second, we show how the Jacobian of the optical system enables efficient importance sampling, which is crucial for difficult paths such as sampling the aperture which is hidden behind lenses on both sides. Our results show that this yields converged images significantly faster than previous methods and accurately renders complex lens systems with negligible overhead compared to simple models, e.g. the thin lens model. We demonstrate the practicality of our method by incorporating it into a bidirectional path tracing framework and show how it can provide information needed for sophisticated light transport algorithms.
Description
@article{:10.1111/cgf.12301,
journal = {Computer Graphics Forum},
title = {{Efficient Monte Carlo Rendering with Realistic Lenses}},
author = {Hanika, Johannes and Dachsbacher, Carsten},
year = {2014},
publisher = {The Eurographics Association and John Wiley and Sons Ltd.},
ISSN = {1467-8659},
DOI = {/10.1111/cgf.12301}
}