EG2014 - Short Papers

Permanent URI for this collection

https://diglib.eg.org/handle/10.2312/7706

Browse

Browsing EG2014 - Short Papers by Subject "I.3.5 [Computer Graphics]"

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Unsupervised Three-dimensional Reconstruction of Small Rocks from a Single Two-dimensional Image
    (The Eurographics Association, 2014) Gilardi, Marco; Watten, Phil L.; Newbury, Paul; Eric Galin and Michael Wand
    Surfaces covered with pebbles and small rocks can often be found in nature or in human-shaped environments. Generating an accurate three-dimensional model of these kind of surfaces from a reference image can be challenging, especially if one wants to be able to animate each pebble individually. To undertake this kind of task manually is time consuming and impossible to achieve in dynamic terrains animations. The method described in this paper allows unsupervised automatic generation of three-dimensional textured rocks from a two-dimensional image aiming to closely match the original image as much as possible.
  • Thumbnail Image
    Item
    A User Study: Is the Advection Step in Shallow Water Equations Really Necessary?
    (The Eurographics Association, 2014) Kellomäki, Timo; Saari, Timo; Eric Galin and Michael Wand
    Heightfield methods, such as the pipe method and shallow water equations (SWE), have often been used to simulate large areas of water. Of these, the SWE are often preferred due to being more realistic, but they are also more complex and demand more computational resources than the pipe method. These two methods were presented to over 40 subjects in both a gaming and a video context to see whether they report noticing the advantages of SWE compared to the pipe method. No significant differences were observed in any of the categories measured (hedonic valence, flow, spatial presence, realism). Therefore, at least considering using the pipe method instead of the SWE is recommended. Also, varying the time step between 5 and 20 ms did not affect the user experience.