PG2013short

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https://diglib.eg.org/handle/10.2312/998

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Browsing PG2013short by Subject "I.3.7 [Computer Graphics]"

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    Fast Random Sampling of Triangular Meshes
    (The Eurographics Association, 2013) Sik, Martin; Krivanek, Jaroslav; Bruno Levy and Xin Tong and KangKang Yin
    We present a simple and fast algorithm for generating randomly distributed points on a triangle mesh with probability density specified by a two-dimensional texture. Efficiency is achieved by resampling the density texture on an adaptively subdivided version of the input mesh. This allows us to generate the samples up to 40 x faster than the rejection sampling algorithm, the fastest existing alternative. We demonstrate the algorithm in two applications: fast placement of hair roots on a surface and sampling of illumination from a complex luminaire. Part of our mesh sampling procedure is a new general acceleration technique for drawing samples from a 1D discrete probability distribution whose utility extends beyond the mesh sampling problem.
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    Video-Realistic Inner Mouth Reanimation
    (The Eurographics Association, 2013) Kawai, Masahide; Iwao, Tomoyori; Maejima, Akinobu; Morishima, Shigeo; Bruno Levy and Xin Tong and KangKang Yin
    We propose a novel post-effect method that can make an existing speech animation video-realistic by generating an inner mouth appearance that is tailored to the speaker. The automatic generation of photorealistic inner mouth appearances requires only simple inputs and small databases and is not restricted by video lighting. The approach is also applicable for creature speech animation with human voices. Our system uses two key algorithms; one of the algorithms models the inner mouth appearances based on physical assumptions, and the other algorithm synthesizes the inner mouth images with care taken to maintain time continuity and luminance gradients.