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首页> 外文会议>Visualization, Image-Guided Procedures, and Display; Progress in Biomedical Optics and Imaging; vol.7,no.27 >Slice cutting and partial exposing techniques for three-dimensional texture-based volume rendering
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Slice cutting and partial exposing techniques for three-dimensional texture-based volume rendering

机译：用于基于三维纹理的体绘制的切片切割和局部曝光技术

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摘要

Three-dimensional texture-based volume rendering is a technique that treats a 3D volume as a 3D texture, renders multiple 2D view-oriented slices and blends them into the frame buffers. This technique is thoroughly developed in computer graphics and medical visualization, and widely accepted due to the advancement of computer hardware. This research aims at developing fast parallel slice cutting and partial exposing algorithms used in real-time 3D-texture-based volume rendering for image-guided surgery and therapy planning. In texture-based volume rendering, a large amount of slices are needed to render the volume to achieve high quality image, but for real-time interactive volume rendering, the computation time is critical. Instead of repeating the cutting algorithms for each slice against the volume data as conventional cutting algorithms do, the slice cutting algorithm developed in this paper applies the cutting only to the initial slice, and gets the slice vertexes and 3D texture coordinates for all the others based on the distance between the current slice and the initial slice. The new algorithm dramatically reduces the computation time for slice cutting, and eases the generation of sectional view for a volume. Partial exposing is another useful technique used in volume visualization to reveal important but hidden information. Two depth-based partial exposing algorithms are developed and implemented in this paper. Both partial exposing techniques can work with arbitrary complex, but convex, shapes of cutaway object, and their implementations maintain the interactive frame rate for 3D texture-based volume rendering without apparent performance decline compared to non-cutaway rendering.
机译：基于三维纹理的体积渲染是一种将3D体积视为3D纹理，渲染多个2D面向视图的切片并将其混合到帧缓冲区中的技术。这项技术在计算机图形学和医学可视化领域得到了彻底的发展，并且由于计算机硬件的进步而被广泛接受。这项研究旨在开发用于基于3D纹理的实时体绘制的快速平行切片切割和局部曝光算法，用于图像引导的手术和治疗计划。在基于纹理的体积渲染中，需要大量的切片来渲染体积以获得高质量的图像，但是对于实时交互式体积渲染而言，计算时间至关重要。本文开发的切片切割算法没有像常规切割算法那样针对体积数据重复针对每个切片的切割算法，而是仅将切割应用于初始切片，并获得了所有其他切片的切片顶点和3D纹理坐标当前切片和初始切片之间的距离。新算法大大减少了切片切割的计算时间，并简化了体积剖视图的生成。部分暴露是在体积可视化中用来揭示重要但隐藏的信息的另一种有用技术。本文开发并实现了两种基于深度的局部曝光算法。两种局部曝光技术都可以与任意复杂但凸起的切面对象形状配合使用，并且它们的实现可为基于3D纹理的体绘制保持交互式帧频，而与非切面渲染相比，性能没有明显下降。

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