Algorithm research is main part of visualization research, the thesis refers to two kinds of algorithms for volume rendering: Fourier volume rendering and shear-warp volume rendering.
算法研究是可视化的主要研究领域，本文的研究涉及两类体绘制算法：频域体绘制和错切变形体绘制。
In the field of terrain visualization, the most efficient tool for real-time rendering of complex landscape is level of detail (LOD).
在地形可视化领域，实时绘制复杂地形场景的最有效工具是LOD技术。
Volume rendering is also known as direct volume rendering, for no intermediate geometry primitives are generated during its visualization process.
由于体绘制技术是将三维的离散数据直接转换为二维图像而不必生成中间几何图元，所以又称为直接体绘制。
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