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weilun sun weilun sun 孙伟伦 menu skip menu home cool stuff welcome to my website hi i am weilun sun a phd student in eecs department at uc berkeley i am now conducting research in rendering and advised by prof ravi ramamoorthi my cv is here before that i was an undergraduate student in computer science technology department at tsinghua university i did some rendering research under the guidance of dr kun xu some images i rendered are shown in cool stuff contact me email sunweilunjwilson at berkeley edu check out my soccer freestyle videos in cool stuff publications anisotropic spherical gaussians kun xu wei lun sun zhao dong dan yong zhao run dong wu shi min hu acm transactions on graphics 32 6 209 1 209 11 2013 proceedings of siggraph asia 2013 we present a novel anisotropic spherical gaussian asg function built upon the bingham distribution bingham 1974 which is much more effective and efficient in representing anisotropic spherical functions than spherical gaussians sgs in addition to retaining many desired properties of sgs asgs are also rotationally invariant and capable of representing all frequency signals to further strengthen the properties of asgs we have derived approximate closed form solutions for their integral product and convolution operators whose errors are nearly negligible as validated by quantitative analysis supported by all these operators asgs can be adapted in existing sg based applications to enhance their scalability in handling anisotropic effects to demonstrate the accuracy and efficiency of asgs in practice we have applied asgs in two important sg based rendering applications and the experimental results clearly reveal the merits of asgs project page paper 2 3m supplemental 1 7m video 45 8m bibtex sketch2scene sketch based co retrieval and co placement of 3d models kun xu kang chen hongbo fu wei lun sun shi min hu acm transactions on graphics 32 4 123 1 123 12 2013 proceedings of siggraph 2013 this work presents sketch2scene a framework that automatically turns a freehand sketch drawing inferring multiple scene objects to semantically valid well arranged scenes of 3d models unlike the existing works on sketch based search and composition of 3d models which typically process individual sketched objects one by one our technique performs co retrieval and co placement of 3d relevant models by jointly processing the sketched objects this is enabled by summarizing functional and spatial relationships among models in a large collection of 3d scenes as structural groups our technique greatly reduces the amount of user intervention needed for sketch based modeling of 3d scenes and fits well into the traditional production pipeline involving concept design followed by 3d modeling a pilot study indicates that it is promising to use our technique as an alternative but more efficient tool of standard 3d modeling for 3d scene construction project page paper 6 1m pptx 33 0m supplemental 4 4m video 12 5m bibtex presentations siggraph asia 2013 technical paper anisotropic spherical gaussians nov 22 2013 siggraph asia 2013 fast forward anisotropic spherical gaussians nov 19 2013 small projects a shape retriever and gui based on siggraph 2012 paper sketch based shape retrieval click here to download executable file content on this page requires a newer version of adobe flash player a basketball shooting game based on a simple physics engine i developed click here to download executable file