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  1. No Access

    Article

    Shape-Adaptive DCT for Denoising of 3D Scalar and Tensor Valued Images

    During the last ten years or so, diffusion tensor imaging has been used in both research and clinical medical applications. To construct the diffusion tensor images, a large set of direction sensitive magnetic...

    Ørjan Bergmann, Oddvar Christiansen, Johan Lie… in Journal of Digital Imaging (2009)

  2. No Access

    Chapter

    An Operator Algebraic Inverse Scale Space Method for Symmetric Matrix Valued Images

    During the last few years, a considerable amount of research has been conducted to study multiscale properties of images via partial differential equations. In this context, we can roughly divide the methodolo...

    Johan Lie, Bernhard Burgeth… in Visualization and Processing of Tensor Fie… (2009)

  3. No Access

    Article

    Image Segmentation Using Some Piecewise Constant Level Set Methods with MBO Type of Projection

    In this work, we are trying to propose fast algorithms for Mumford-Shah image segmentation using some recently proposed piecewise constant level set methods (PCLSM). Two variants of the PCLSM will be considere...

    Xue-Cheng Tai, Oddvar Christiansen, ** Lin… in International Journal of Computer Vision (2007)

  4. No Access

    Chapter and Conference Paper

    Piecewise Constant Level Set Method for 3D Image Segmentation

    Level set methods have been proven to be efficient tools for tracing interface problems. Recently, some variants of the Osher- Sethian level set methods, which are called the Piecewise Constant Level Set Metho...

    Are Losnegård, Oddvar Christiansen… in Scale Space and Variational Methods in Com… (2007)

  5. No Access

    Chapter and Conference Paper

    Fast Implementation of Piecewise Constant Level Set Methods

    Oddvar Christiansen, Xue-Cheng Tai in Image Processing Based on Partial Differen… (2007)