Quad-Based Fourier Transform for Efficient Diffraction Synthesis

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Date
2018
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Publisher
The Eurographics Association and John Wiley & Sons Ltd.
Abstract
Far-field diffraction can be evaluated using the Discrete Fourier Transform (DFT) in image space but it is costly due to its dense sampling. We propose a technique based on a closed-form solution of the continuous Fourier transform for simple vector primitives (quads) and propose a hierarchical and progressive evaluation to achieve real-time performance. Our method is able to simulate diffraction effects in optical systems and can handle varying visibility due to dynamic light sources. Furthermore, it seamlessly extends to near-field diffraction. We show the benefit of our solution in various applications, including realistic real-time glare and bloom rendering.
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@article{
10.1111:cgf.13484
, journal = {Computer Graphics Forum}, title = {{
Quad-Based Fourier Transform for Efficient Diffraction Synthesis
}}, author = {
Scandolo, Leonardo
and
Lee, Sungkil
and
Eisemann, Elmar
}, year = {
2018
}, publisher = {
The Eurographics Association and John Wiley & Sons Ltd.
}, ISSN = {
1467-8659
}, DOI = {
10.1111/cgf.13484
} }
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