光线投射是一种高质量的体绘制方法。
Ray casting is a widely recognized method for high quality volume rendering.
从而对混合数据进行体绘制。
直接体绘制本质是重采样与图像合成。
The essential of direct volume-rendering technique are re-sample and image synthesize.
灰度图像插值是体绘制的预处理步骤。
Gray scale image interpolation is a preprocessing step for volume rendering in medicine.
光线投射算法是体绘制中的经典方法。
研究有效的体绘制加速算法。
An effective fast volume rendering algorithm is investigated.
提出了基于线性八叉树的加速体绘制算法。
In this paper, an algorithm is proposed for the accelerated rendering of volume on linear octrees basis.
交互式体绘制算法基于一个新的可视化模型。
An interactive volume rendering algorithm is presented which is based on a novel optical visualization model.
基于硬件加速的体绘制技术是本文的研究重点。
Hardware accelerated volume rendering technique is the key point of this thesis.
非规则数据场的体绘制是可视化的一个热点和难点。
Volume rendering of irregular data field is a hot but knotty field in VISC recently.
目前体绘制策略的实现主要有两种：软件实现和硬件实现。
From now on, there are mainly two implementations of volume rendering, one is software implementation, the other is hardware implementation.
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。
The 2d medical image can be transformed into the 3d image by surface reconstruction and volume rendering.
对几种体绘制算法进行研究，对其绘制效果进行分析和比较。
After study several volume rendering algorithms and analyze the effect.
对此，提出了一种在体绘制基础上可对任意部位进行测量的方法。
This paper presents a measurement method based on volume rendering that any position can be measured.
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。
In this paper, three-dimensional seismic data field of direct volume rendering-Ray Casting Algorithm is mainly studied.
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。
It can display the whole characteristics and inner detail information of ICT 3d data by volume rendering.
体绘制的应用领域十分广泛，涵盖了医学、气象学和地质勘探等领域。
Volume rendering can be applied in many fields including medical science, meteorology and geological exploration.
用文中提出的体绘制算法绘制了三元数法和四元代数法所构造的三维M集。
Finally, the 3-d M-sets generated by the ternary number and quaternion algebra are both rendered by our new algorithm.
方法在体绘制前，将每个体数据的每个层片编码成以体素值为序的有序数组。
Method Before volume rendering we transfer each slice of volume into an array indexed by the value of voxels, element in which stores the position of each voxel.
在象空间中的直接体绘制方法中，本文提出了一种新的估计表面法向量的方法。
And a new method to estimate the normal vector of the surface in Direct Voltime Rendering in Image Space is introduced.
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。
Color composition is an important part in volume rendering, and its computation is very time-consuming.
并用体元投射和三维纹理映射方法分别实现了混合八叉树的体绘制与多分辨率绘制。
Volume rendering and multi-resolution rendering for hybrid octree via cell projection and 3D-texture mapping are implemented.
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。
In this work, we implement the traditional ray-casting-based volume rendering algorithm on the programmable graphics processing unit (GPU).
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。
In order to display important organs outstandingly, a new approach for fast volume rendering algorithm based on mixed data sets was put forward.
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。
Objective To describe a spatial data structure called sorted volumetric data structure which speeds up the volume rendering and will not affect image quality.
在微机平台上实现的基于体绘制的虚拟内窥镜系统，验证了该算法的实时性和所生成图像的质量。
The virtual endoscopy system, which is implemented in microcomputer platform, validates the algorithm′s real time quality and the fine resulting image.
本论文中改进了算法中的选择条件、绘制条件和剔除条件，更有效提高了地震数据体绘制的速度。
We improve the algorithm of selecting conditions, rendering conditions and excluding conditions to further increase the rendering speed of seismic data.
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。
Then, the paper talked about the volume rendering technology, using GPU on that area, and set out the operation effect of the visualization software.
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。
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.
在医学图像的三维可视化中，不透明度传递函数和观察角度是需要频繁调节的，因此，难以实现实时体绘制。
In the visualization of 3d medical images, it is common to adjust the opacity transfer function and viewing Angle frequently so that volume rendering is difficult to be realized in real-time.
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