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首页> 外文期刊>IEEE transactions on visualization and computer graphics >Illustrative Context-Preserving Exploration of Volume Data
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Illustrative Context-Preserving Exploration of Volume Data

机译:体积数据的示例性上下文保护探索

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In volume rendering, it is very difficult to simultaneously visualize interior and exterior structures while preserving clear shape cues. Highly transparent transfer functions produce cluttered images with many overlapping structures, while clipping techniques completely remove possibly important context information. In this paper, we present a new model for volume rendering, inspired by techniques from illustration. It provides a means of interactively inspecting the interior of a volumetric data set in a feature-driven way which retains context information. The context-preserving volume rendering model uses a function of shading intensity, gradient magnitude, distance to the eye point, and previously accumulated opacity to selectively reduce the opacity in less important data regions. It is controlled by two user-specified parameters. This new method represents an alternative to conventional clipping techniques, sharing their easy and intuitive user control, but does not suffer from the drawback of missing context information
机译:在体绘制中,很难同时可视化内部和外部结构,同时保留清晰的形状提示。高度透明的传递函数会产生具有许多重叠结构的混乱图像,而剪切技术会完全删除可能重要的上下文信息。在本文中,我们受插图技术的启发,提出了一种新的体绘制模型。它提供了一种以特征驱动的方式交互式检查体积数据集内部的方法,该方法保留了上下文信息。保持上下文的体积渲染模型使用阴影强度,渐变大小,到视点的距离以及以前累积的不透明度的函数来有选择地减少不太重要的数据区域中的不透明度。它由两个用户指定的参数控制。这种新方法代表了常规剪辑技术的替代方法,共享了它们简单而直观的用户控制功能,但是没有缺少上下文信息的缺点。

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