Display of surfaces from volume data
TL;DR: In this article, a volume-rendering technique for the display of surfaces from sampled scalar functions of 3D spatial dimensions is discussed, which is not necessary to fit geometric primitives to the sampled data; images are formed by directly shading each sample and projecting it onto the picture plane.
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Abstract: The application of volume-rendering techniques to the display of surfaces from sampled scalar functions of three spatial dimensions is discussed. It is not necessary to fit geometric primitives to the sampled data; images are formed by directly shading each sample and projecting it onto the picture plane. Surface-shading calculations are performed at every voxel with local gradient vectors serving as surface normals. In a separate step, surface classification operators are applied to compute a partial opacity of every voxel. Operators that detect isovalue contour surfaces and region boundary surfaces are examined. The technique is simple and fast, yet displays surfaces exhibiting smooth silhouettes and few other aliasing artifacts. The use of selective blurring and supersampling to further improve image quality is described. Examples from molecular graphics and medical imaging are given. >
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Citations
A ray-slice-sweep volume rendering engine
Ingmar Bitter,Arie E. Kaufman +1 more
- 03 Aug 1997
TL;DR: This paper presents Cube-.#L, a volume rendering architecture which employs a ray-slice-sweeping algorithm which improves the Cube-4 architecture in three ways, and Cube-AL, which has less control overhead than Cube-C.
11 – Hardware-Accelerated Volume Rendering
Hanspeter Pfister
- 01 Jan 2005
TL;DR: This chapter describes several approaches to volume rendering that have been successfully accelerated by hardware and focuses on the underlying rendering algorithms and principles and refers to the literature for implementation details.
30
Automatic adjustment of bidimensional transfer functions for direct volume visualization of intracranial aneurysms
Fernando Vega Higuera,N. Sauber,Bernd Tomandl,Christopher Nimsky,G. Greiner,Peter Hastreiter +5 more
- 05 May 2004
TL;DR: This work introduced the use of bidimensional TFs based on measured intensities and gradient magnitudes for the visualization of aneurysms involving the skull base through a registration of respective 2D histograms, making it possible to successfully use bid dimensional TFs without technical insight and training.
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Interactive volume visualization on a heterogeneous message-passing multicomputer
Andrei State,Jonathan McAllister,Ulrich Neumann,Hong Chen,Tim J. Cullip,David Chen,Henry Fuchs +6 more
- 15 Apr 1995
TL;DR: The parallelization and load balancing techniques used in order to achieve interactive response and near-real-time frame rates are described and some general conclusions about operation of image-order rendering algorithms on message-passing multicomputers are derived.
Visualization of multidimensional image data sets using a neural network
Markus Groß,Frank Seibert +1 more
TL;DR: The Kohonen map is introduced, that orders its neurons according to topological features of the data sets to be trained with, that can be called a topology-preserving feature map and can be used to solve general visualization problems of data mapping into a lower dimensional representation.
30
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Illumination for computer generated pictures
TL;DR: Human visual perception and the fundamental laws of optics are considered in the development of a shading rule that provides better quality and increased realism in generated images.
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Thomas K Porter,Thomas Douglas Selkirk Duff +1 more
- 01 Jan 1984
TL;DR: In this article, a matte component can be computed similarly to the color channels for four-channel pictures, and guidelines for the generation of elements and arithmetic for their arbitrary compositing are discussed.
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Compositing digital images
PorterThomas,DuffTom +1 more
TL;DR: Most computer graphics pictures have been computed all at once, so that the rendering program takes care of all computations relating to the overlap of objects.
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Shading 3D-Images from CT Using Gray-Level Gradients
Karl Heinz Höhne,Ralph Bernstein +1 more
TL;DR: For the 3D-reconstruction of organ surfaces from tomograms, a shading method based on the partial volume effect is presented and it is shown, that at least for bone and soft tissue surfaces, the results are superior to conventional shading.
288
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