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"abstract": "In this paper a novel technique for smooth shape-based interpolation of volume data\r\nis introduced.\r\nPreviously simple linear interpolation of signed\r\ndistance maps has been used in practice. As it will be shown, this approach\r\nresults in artifacts, since sharp edges appear along the original slices.\r\nIn order to obtain a smooth 3D implicit function generated\r\nby interpolating 2D distance maps, we use a global interpolation method instead of a\r\nhigher order local technique. The global curvature of the implicit function representing\r\nan isosurface is minimized using an iterative conjugate gradient method.\r\nBecause of the iterative approach the user can easily control the trade-off between\r\nthe smoothness of the isosurface and the computational cost of the refinement.\r\nAs opposed to previous techniques, like variational interpolation, our method can\r\ngenerate a reasonably good approximation of the ideal solution in a significantly\r\n shorter time.",
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"abstract": "Due to characteristics of the human visual system different colors induce different\ndepth perception. This chromo-stereoscopy has been already used for 3D data to enhance\na third spatial dimension. We propose to use chromo-stereoscopy for 2D abstract data.\nColor coding introduces a depth cue which encodes relevance with chromo-stereoscopy.\nThe focus information literally stands out as compared to the context information.\nWe applied this technique on two-dimensional graphs and multi-layer representations.\n Our approach can also be easily combined with other focus+context methods.",
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"title": "Christmas Tree Case Study: Computed Tomography as a Tool for Mastering Complex Real World Objects with Applications in Computer Graphics",
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"abstract": "We report on using computed tomography (CT) as a model acquisition\ntool for complex objects in computer graphics. Unlike other modeling\nand scanning techniques the complexity of the object is irrelevant in\nCT, which naturally enables to model objects with, for example,\nconcavities, holes, twists or fine surface details. Once the data is\nscanned, one can apply post-processing techniques aimed at its further\nenhancement, modification or presentation. For demonstration purposes\nwe chose to scan a Christmas tree which exhibits high complexity which\nis difficult or even impossible to handle with other\ntechniques. However, care has to be taken to achieve good scanning\nresults with CT. Further, we illustrate the post-processing by means\nof data segmentation and photorealistic as well as non-photorealistic\n\t\t surface and volume rendering techniques.",
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"abstract": "Visualization of tubular structures such as blood vessels is an\nimportant topic in medical imaging. One way to display tubular\nstructures for diagnostic purposes is to generate longitudinal\ncross-sections in order to show their lumen, wall, and surrounding\ntissue in a curved plane. This process is called Curved Planar\nReformation (CPR). We present three different methods to generate\nCPR images. A tube-phantom was scanned with Computed Tomography (CT)\nto illustrate the properties of the different CPR methods. Furthermore\nwe introduce enhancements to these methods: thick-CPR, rotating-CPR\n \t\t and multi-path-CPR.",
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