Computer Graphics and CAD

  • Christensen, Niels Jørgen (Project Manager)
  • Nielsen, Hans Peter (Project Participant)
  • Jensen, Henrik Wann (Project Participant)
  • Bormann, Karsten (Project Participant)
  • Bærentzen, Jakob Andreas (Project Participant)

    Project Details


    The overall purpose of this longterm project is to contribute to development of CAD systems and other 3D graphics systems such as Virtual Reality, computer animation, multimedia and scientific visualization systems. During the years the focus has been on visualization, modelling and the user interface part and the main application areas has been technical communication and CAD systems used in the early design stages of a project. At present the focus is on visualization and volume modelling.
    Many student project has contributed to the project of Global Illumination - the creation of realistic looking synthetic images. The focus of the project has been on rendering complex models containing procedural objects such as fractals without tesselating these objects. For this purpose Monte Carlo based ray tracing techniques have been used. Since pure Monte Carlo ray tracing is very inefficient the Photon Map was invented as a useful technique for optimizing the evaluation of the rendering equation. The
    Photon Map can be used to render caustics, used to optimize the rendering of indirect illumination and direct illumination. The photon map uses statistical techniques on a 3d-point set to compute information such as the incoming flux and the reflected radiance. This 3d-point set is stored using a balanced kd-tree which is completely independent of the geometry in the model. This has the advantage that the storage and computation of the global illumination is possible even in very large models containing millions of triangles (which can be instantiated). This is more costly using the popular radiosity method since it stores irradiance information with every patch in the model.
    The second part of the project is focusing on Virtual Reality (visualization and Volume models)
    Effective start/end date01/02/1988 → …


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