Occlusion-free camera control for multiple targets

M. Christie, J. M. Normand, P. Olivier

    Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

    7 Citations (Scopus)


    Maintaining the visibility of target objects is a fundamental problem in automatic camera control for 3D graphics applications. Practical real-time camera control algorithms generally only incorporate mechanisms for the evaluation of the visibility of target objects from a single viewpoint, and idealize the geometric complexity of target objects. Drawing on work in soft shadow generation, we perform low resolution projections, from target objects to rapidly compute their visibility for a sample of locations around the current camera position. This computation is extended to aggregate visibility in a temporal window to improve camera stability in the face of partial and sudden onset occlusion. To capture the full spatial extent of target objects we use a stochastic approximation of their surface area. Our implementation is the first practical occlusion-free real-time camera control framework for multiple target objects. The result is a robust component that can be integrated to any virtual camera control system that requires the precise computation of visibility for multiple targets.

    Original languageEnglish
    Title of host publicationComputer Animation 2012 - ACM SIGGRAPH / Eurographics Symposium Proceedings, SCA 2012
    EditorsDieter W. Fellner
    PublisherAssociation for Computing Machinery (ACM)
    Number of pages6
    ISBN (Electronic)9783905674378
    Publication statusPublished - 29 Jul 2012
    EventACM SIGGRAPH/Eurographics Symposium on Computer Animation, SCA 2012 - Ecole Polytechnique Federale de Lausanne, Lausanne, Switzerland
    Duration: 29 Jul 201231 Jul 2012
    Conference number: 11th


    ConferenceACM SIGGRAPH/Eurographics Symposium on Computer Animation, SCA 2012
    Abbreviated titleSCA 2012
    Internet address

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