Efficient Ray Tracing Through Aspheric Lenses and Imperfect Bokeh Synthesis
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Date
2016
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}
}