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As an effective tool for revealing internal structures, direct volume rendering has been widely used in 3D medical image visualization. However, its quality strongly depends on the transfer function design in the rendering process of mapping data values to the optical properties. In this paper, a novel and intuitive method for transfer function design based on the feature variation curve is proposed...
This paper presents a novel technique to efficiently compute illumination for Direct Volume Rendering using a local approximation of ambient occlusion to integrate the intensity of incident light for each voxel. An advantage with this local approach is that fully shadowed regions are avoided, a desirable feature in many applications of volume rendering such as medical visualization. Additional transfer...
The transfer function is the basis of direct volume rendering, and how to design it is also a crucial step for the volume visualization. Multi-dimensional transfer functions are a very effective way to extract materials and their boundaries for scalar data. For many applications, boundaries carry most of the relevant information. Based on the definition of transfer functions, this paper discusses...
This paper describes the Medical Visualizer, a real-time visualization system for analyzing medical volumetric data in various virtual environments, such as autostereoscopic displays, dual-projector screens and immersive environments such as the CAVE. Direct volume rendering is used for visualizing the details of medical volumetric data sets without intermediate geometric representations. By interactively...
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