可见性

But, secrecy envelops most aspects of Chinese security affairs.

但是，中国安全事务带有大量的不可见性。

At first, it analyses the visibility processing of complex scene, including: spatial partition technology BSP, quadtree, octree and equational octree which can optimize scene, category of quick visibility estimation algorithm in the 3D scene, portal which can accelerate rendering, level of detail and mesh simplification based on quadric error metrics used to simply models in 3D scene.

首先分析了复杂场景的可视化处理，包括优化场景渲染的空间剖分技术：BSP树、四叉树、八叉树、均分八叉树；其次是三维场景快速可见性判断算法的分类，可加速渲染的入口技术；最后是用于三维场景中模型简化的两个算法：层次细节模型简化技术和基于视点的二次误差度量网格简化。

This kind of choice imbeds the method of the watermark data position, making use of the picture well the characteristics of the high information of frequency and the sense of vision characteristic of the person, be advantageous to watermark"s can"t see the sex and flimsiness.

这种选择嵌入水印数据位置的方法，充分利用了图像中高频信息本身的特点和人的视觉特性，有利于水印的不可见性和脆弱性。

Goldschmidt s gnomonic projection,a method of comparison with line and face about the identified visibility of the crystal face on gnomonic plane is given to search hidden line of mineral crystal shape.

根据图形消隐的基本原理，针对心射极平投影的特点，使用线、面比较法在极平投影面上判断晶面的可见性，进而消除矿物晶体形态图中的隐藏线。

According to the projection space, line and plane can be divided into upward-traveling and downward-traveling. The concepts of near axial-terminal and far axial-terminal to the straight line projection is introduced. The rule of the visibility of line and plane intersection is deduced.

将直线和平面按其在投影空间的位置，分为上行和下行两类，对直线的投影引入近轴端和远轴端的概念，有助于对线面相交空间位置的理解，而且使直线与平面相交可见性的规律更加清晰和直观。

We hope it will make the social networks around products visible and navigable.

我们希望它能够让产品的社会网络具有可见性和导向性。

The synthesis scheme we developed can deal with changes in visibility, produce perspectively correct views and handle the distortion around the circumferences in the synthesized views. In our scheme, the area without corresponding points was first determined by using Fourier transformation in order to deal with distortion problem, within the mutual overlapped area the z-buffer values of matched key points were computed so that the visibility in novel views can be handle correctly, lastly the common points in new views are rendered through epipolar geometry constraint.

算法的步骤为：利用傅立叶变换方法确定相邻源图像无对应点的区域；然后，利用尺度空间和相位一致原理在共同区域提取及匹配边缘上的关键点，计算其深度值，并在新图像中由该值判别虚拟图像中的可见性；再由关键点恢复极线约束，通过极线间的位置和颜色插值生成虚拟图像中有对应区域的一般点；在确定极线位于无对应点区域段后，利用加权平均或放大插值的方法实现了源图像无对应点区域在虚拟图像中的自然过渡。

The prepositive processing program is designed and coded. Meanwhile, to display the parameters value and curve, the host testing program is developed.

同时，为了测试的可见性和直观性，还开发了主机测试系统用以实时显示测量数据及参数波形。

The projection sequence of plane graphs apex and relationship of the sequence and plane faces were discussed.

阐述了空间直线与平面相交，彼此相对位置的不变性，提出并论证了各种位轩直线与平面相交，直线在相邻两投影面上可见性的投影规律。

In this paper,we introduce the method to take multislit pseudocolor encoding rainbow hologram with modulating light.

本文介绍一种调制多狭缝假彩色编码全息图的制作，这种方法尤其适用于制做二维象面模压全息图，具有图象清晰，可见性强，对再现光源要求低的优

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。