Ray casting is a widely recognized method for high quality volume rendering.
光线投射是一种高质量的体绘制方法。
The flexibility and superior image fidelity of volume rendering make it a very useful technique in an increasing number of applications.
容积再现技术的灵活性和较高的图像精确性使其成为非常有用的技术，应用范围在不断增加。
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。
And volume rendering of mixed data was processed.
从而对混合数据进行体绘制。
An effective fast volume rendering algorithm is investigated.
研究有效的体绘制加速算法。
The speed of volume rendering is the bottleneck of interactive visualization.
体数据的绘制速度是交互可视化的瓶颈。
Hardware accelerated volume rendering technique is the key point of this thesis.
基于硬件加速的体绘制技术是本文的研究重点。
Gray scale image interpolation is a preprocessing step for volume rendering in medicine.
灰度图像插值是体绘制的预处理步骤。
Methods in 13 cases, maxillofacial fractures were demonstrated with 3dct volume rendering.
方法对13例颌面复杂骨折患者，进行三维ct体积重建。
Color composition is an important part in volume rendering, and its computation is very time-consuming.
颜色合成是体绘制的重要组成部分，其中大量重复计算严重影响了绘制的实时性。
The 2d medical image can be transformed into the 3d image by surface reconstruction and volume rendering.
通过表面重建和体绘制，可将医学二维图象转化为三维图象。
It can display the whole characteristics and inner detail information of ICT 3d data by volume rendering.
体绘制技术可以显示工业CT三维数据的整体特征和内部细节信息。
We have shown volume rendering to be superior to SSD in demonstrating surgically created femur fractures .
我们认为在用于外科显示股骨骨折方面，容积再现优于SSD。
An interactive volume rendering algorithm is presented which is based on a novel optical visualization model.
交互式体绘制算法基于一个新的可视化模型。
In this paper, three-dimensional seismic data field of direct volume rendering-Ray Casting Algorithm is mainly studied.
本文主要研究三维地震数据场的直接体绘制方法——光线投射算法。
Moreover, in volume rendering the dynamic range of the image is preserved, enabling display of vessels, soft tissue, and viscera.
此外，在容积再现中图像的动态范围被保留，能够显示血管、软组织和内脏。
In this work, we implement the traditional ray-casting-based volume rendering algorithm on the programmable graphics processing unit (GPU).
将传统的光线投射体绘制算法在具有可编程管线的图形处理器（GPU）上重新实现。
From now on, there are mainly two implementations of volume rendering, one is software implementation, the other is hardware implementation.
目前体绘制策略的实现主要有两种：软件实现和硬件实现。
Objective:To study the ways of volume rendering(VR) three-dimensional reconstruction(3D) by spiral CT, and evaluate its clinical applications.
目的：探讨螺旋CT三维容积重建（VR）成像方法，评价其临床运用范围与价值。
In order to display important organs outstandingly, a new approach for fast volume rendering algorithm based on mixed data sets was put forward.
为了突出人体重点器官的显示，提出了一种新颖的基于混合数据场的快速体绘制算法。
Then, the paper talked about the volume rendering technology, using GPU on that area, and set out the operation effect of the visualization software.
随后文章介绍了体绘制技术与GPU技术在这方面的应用，并展示了编写的显示端软件的执行效果。
Objective To describe a spatial data structure called sorted volumetric data structure which speeds up the volume rendering and will not affect image quality.
本文提出一种称为有序体数据的空间数据结构，它可以有效地加速体绘制而对图像质量没有影响。
To evaluate multi-planar reconstruction MPR, maximum intensity projection MIP and volume rendering technique VR in diagnosis of complicated maxillofacial fractures.
多种后处理技术，即多平面重建、最大密度投影及容积再现在颌面部复杂骨折中的应用价值。
The transepicondylar axis of different position has no effect on volume rendering technique measuring the humeral head retroversion angle with multi slice spiral CT.
肱骨远端不同位置内外上髁轴线对多层螺旋CT容积再现测量肱骨头扭转角没有影响；
The volume rendering method does shading processes to all of the volume data directly, maintains the details of the medical images, and achieves better render results.
其中的体绘制方法直接对所有的体数据进行处理，有利于保留三维医学图像的细节信息，具有较好的绘制效果。
Finally, the processed water and seafloor data is combined, and then the visualization of SAS volume data is achieved by the ray casting algorithm of direct volume rendering.
最后，将处理后的水体和地层数据合并，并通过直接体绘制中的光线投射算法有效地实现了水声体数据的三维可视化。
Ray casting is an important algorithm in direct volume rendering, but it has the disadvantages of the large amount of computation and inefficient computation of sampling-points.
光线投射法是一种重要的体绘制算法，但直线上采样点的确定和采样值计算是非常费时的，也是影响体绘制实时性的重要因素。
Several key techniques are described including the representation and classification of volume data, typical algorithms of surface rendering, volume rendering and hybrid rendering.
对体视化的几种关键技术进行了分类综述，介绍了体数据的表示和分类，面绘制、体绘制和混合绘制各类典型算法的原理和特点。
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。
Finally, a network-oriented large-scale data volume rendering system framework is introduced to resolve large-scale data storage, network transmission and high-quality fast rendering.
最后，针对大规模数据存储、网络传输和高质量快速绘制等问题，给出了一个面向网络传输的大规模数据体绘制系统框架。
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