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• W2150868589 abstract "Motion blur is crucial for high-quality rendering, but is also very expensive. Our first contribution is a frequency analysis of motion-blurred scenes, including moving objects, specular reflections, and shadows. We show that motion induces a shear in the frequency domain, and that the spectrum of moving scenes can be approximated by a wedge. This allows us to compute adaptive space-time sampling rates, to accelerate rendering. For uniform velocities and standard axis-aligned reconstruction, we show that the product of spatial and temporal bandlimits or sampling rates is constant, independent of velocity. Our second contribution is a novel sheared reconstruction filter that is aligned to the first-order direction of motion and enables even lower sampling rates. We present a rendering algorithm that computes a sheared reconstruction filter per pixel, without any intermediate Fourier representation. This often permits synthesis of motion-blurred images with far fewer rendering samples than standard techniques require." @default.
• W2150868589 created "2016-06-24" @default.
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• W2150868589 date "2009-07-27" @default.
• W2150868589 modified "2023-10-10" @default.
• W2150868589 title "Frequency analysis and sheared reconstruction for rendering motion blur" @default.
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• W2150868589 doi "https://doi.org/10.1145/1531326.1531399" @default.
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