Efficient Ray Tracing Through Aspheric Lenses and Imperfect Bokeh Synthesis
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Date
2016
Authors
Joo, Hyuntae
Kwon, Soonhyeon
Lee, Sangmin
Eisemann, Elmar
Lee, Sungkil
Kwon, Soonhyeon
Lee, Sangmin
Eisemann, Elmar
Lee, Sungkil
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association and John Wiley & Sons Ltd.
Abstract
We present an efficient ray-tracing technique to render bokeh effects produced by parametric aspheric lenses. Contrary to conventional spherical lenses, aspheric lenses do generally not permit a simple closed-form solution of ray-surface intersections. We propose a numerical root-finding approach, which uses tight proxy surfaces to ensure a good initialization and convergence behavior. Additionally, we simulate mechanical imperfections resulting from the lens fabrication via a texture-based approach. Fractional Fourier transform and spectral dispersion add additional realism to the synthesized bokeh effect. Our approach is well-suited for execution on graphics processing units (GPUs) and we demonstrate complex defocus-blur and lens-flare effects.
Description
@article{10.1111:cgf.12953,
journal = {Computer Graphics Forum},
title = {{Efficient Ray Tracing Through Aspheric Lenses and Imperfect Bokeh Synthesis}},
author = {Joo, Hyuntae and Kwon, Soonhyeon and Lee, Sangmin and Eisemann, Elmar and Lee, Sungkil},
year = {2016},
publisher = {The Eurographics Association and John Wiley & Sons Ltd.},
ISSN = {1467-8659},
DOI = {10.1111/cgf.12953}
}