- 更多网络例句与球面投影相关的网络例句 [注：此内容来源于网络，仅供参考]
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This thesis contributes to geometry compression in the following aspects: Proposes a method of progressive spherical mesh parameterization based on local parameterization by directly projecting the deleted vertices to its neighborhood. Based on spherical mesh paramterization, an adaptive subdivision remeshing method by progressivly redistributing of sampling points is proposed, by this means, the main geometry information of the original mesh can be captured with only a small amount of samples, it can also be used in mesh simplification. By regarding attributes binded on mesh vertices as geometry signals and transferring them onto a uint sphere by means of spherical mesh parameterization, meshes with different attributes are compressed with spherical wavelet successfully with high compression rate. As a kind of lossy geometry compression technique, two mesh simplification algorthimes are also presented in this thesis.
归纳起来，本文的主要贡献有：提出了以直接投影局部参数化方法为基础的网格累进球面参数化方法；在网格球面参数化方法的基础之上，提出了一种基于累进优化布点方案的网格细分采样方法，该方法可以用很少的采样点就可以捕获到网格的主要特征，因此我们也将其用于后面的网格简化工作当中；通过将网格顶点上定义的各种属性看成几何信号，并以网格球面参数化为手段将几何信号迁移到单位球面上，从而成功地实现了用球面小波对各种几何信号的压缩；作为一种有损压缩方法，本文还提出了基于统一距离的网格简化算法和基于重采样的网格简化算法。
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According to the principle of the diameter of a circle corresponding to the right angle and the principle of short side for little angle in right triangle, projecting the initially-chosen point to the hyper-planes of the linear equation group in which every linear equation can be regarded as a hyper-plane and the projection points can be obtained. The initially-chosen point, and one arbitrary projection point, and the solution point are all on the surface of the relative hyper-geometry ball, therein-to, there is a projection point which is nearest to the solution point and it can be regarded as the next iterative initially-chosen point, so the solution problem of the linear equation group can be changed as an iterative problem of approaching the solution on the surface of a hyper-geometry ball.
根据直径对应的圆周角足直角以及直角三角形中短边对小角的原理进一步知道，当将初始点向线性方程组中各个方程所代表的超平面上投影得到投影点时，初始点和其任何一个投影点及方程组的解点都将位于一个相应的超球面上，其中必定存在一个投影点离问题解点的距离最短，即把该点作为下一次迭代的初始点，从而可将线性方程组求解的问题变成球面上逼近解点的迭代问题。
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Then we transform the fisheye image of 180 degree to normal perspective image.
再用一种简单的数学模型即球面投影，实现了180度鱼眼图像的还原。
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On the basis of on the analysis of current spherical spatial data structure, the clew of the spherical spatial basal subdivision mode which uses Snyder equal area projection on the truncated icosahedron DGG is discussed, and then global multi-resolution overlay is obtained by subdividing hierarchically on the initial projection plane according to the hexagonal grid.
在分析当前球面空间数据结构的基础上，讨论了利用Snyder等积投影在二十面体上建立球面空间基础剖分方式的思路，然后在初始投影面上采用六边形格网进行层次细分，获得多分辨率的全球铺盖。
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According to monotone assembly sequence planning, a decomposition process is developed to generate the assembly sequences. We infer the disassembly direction set of part by use of sphere projection and Cobstacle etc.
在建立的装配模型基础上，先通过对装配模型中零件间的装配关系做矢量分析，应用球面投影处理、投影法和C-空间障碍可以得到各零件在产品中的拆卸方向域信息。
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In this chapter, three kinds of target recognition methods are performed, which are:①Target recognition method based on the description of polarization parameter plane. The echo polarization states of target are projected onto the polarization state plane described by the ellipticity ε and the tilt angle τ of the polarization ellipse, the change of parameter following ferquency becomes the chart. According to the changing trait of the chart, the multidimensional polarization feature space of target has been contructed. Furthermore, a series of polarization feature parameters used in designing the structure of target recognition device are extracted, and they are insensible to the posture of target.②Target recognition method based on the description of Poincare polarization sphere. The echo polarization states of target expressed by Stokes vector are projected onto the Poincare polarization sphere. The conception of polarization ferquency stability, which is used in describing the dynamic distribution characteristics of the target echo polarization states on Poincare polarization sphere, has been defined. A group of polarization feature parameters used in designing the structure of target recognition device are extracted, and they are insensible to the posture of target.③Target recognition method based on the description of frequency sensitivity. In accordance with the conception of the polarization state distance defined on Poincare polarization sphere, the frequency sensibility of the physical structure property of target has been investigated, the frequency distribution feature curves in PSD domain are obtained, and targets'features are extracted by means of the curve-fitting method with Least Square Criterion.
这章具体研究了基于三种极化散射特性描述的相应的目标识别方法：①基于极化参数平面描述的目标识别方法，将目标回波极化状态投影到以极化椭圆参数，即椭圆率角ε和倾角τ表征的极化状态平面上，参数随观测频率的变化就形成了图，根据图的变化特点构造了目标的多维极化特征空间，并提取了不敏感目标姿态变化的极化特征参数组来设计目标的识别器结构；②基于Poincare极化球面描述的目标识别方法，采用Stokes矢量表征目标回波的极化状态，并将其投影到描述极化状态的Poincare极化球面上，定义了极化频率稳定度的概念用以刻画目标回波极化状态在Poincare极化球面上的动态分布信息，提取了准方位不变性的目标极化特征，最后设计了目标的识别器结构；③基于频率敏感性描述的目标识别方法，通过在Poincare极化球面上所定义的极化状态距离的概念，研究的是复杂目标物理结构特性对探测信号频率的敏感程度问题，获得了在极化状态距离下的频率分布特性曲线，采用最小二乘估计曲线拟合方法，它既用于极化特征的降维，同时又直接将拟合参数作为目标的分类特征。
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The paper analyzes theoretically the influence law of length distortion after the reductions from measured side length to reference ellipsoid surface and then from side length on the reference ellipsoid surface to gauss perspective plane. It also discusses theoretical methods to restrict and the projection distortion influence.
从理论上分析了将实测边长归算到参考椭球面上和将参考椭球面上的边长归算到高斯投影面上的长度变形影响规律，讨论限制和减小这种投影变形影响的理论方法。
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At a value of zero there is no effect, while at a value of 1.0 it is a spherical projection of the noise function, creating a starburst effect.
零值没有效果，当值为1.0的时候它变成一个杂色函数的球面投影，创建一个星爆炸效果。
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The study is includes: some images having some repeated area is projected on the spherical surface, and the adjacency pixels is matched, the seam line is clear, and get the background image from the panoramic spherical image according to the relation table based on view angle.
该方法研究了利用多幅具有重叠边界的客观图像通过球面投影、相邻图像像素匹配、消除相邻图像拼接处亮度差，进行无缝拼接获得全景图，以及在仿真过程中通过对应关系表得到正确背景图像的方法。
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The off-axis reflection system composed of four aspheric mirrors was designed, but the system structure was not so simple and the performance can also be improved, besides, manufacture and test for large aspheric mirrors are difficult; and then the spherical Fresnel mirror which is easier to be manufactured and tested was used to replace the aspheric mirror, the spherical Fresnel mirror has low cost of replication, but this design also can\'t be used in projection lens because it was only feasible in narrow wavebands; Furthermore, the design making use of catadioptric projection lens was accomplished, this design is greatly applied in rear projector because it has merits of both refraction and reflection. But it had difficulties in color aberration correction and had complex structure.
设计了四片非球面组成的离轴式反射系统，然而，仅采用非球面设计系统结构不够精简，性能也有待进一步提高，且非球面面形较大时加工和检测都存在一定的困难；继而提出了用球面Fresnel反射镜代替非球面的设计方法，虽然Fresnel反射镜加工和检测更为简单，且复制成本低，但对波长具有选择性；进而，应用折反系统结合的方式设计了离轴式投影镜头，该方法因兼具折射和反射的优点，在大屏幕超薄背投系统的设计中广为应用，缺点是会产生难以校正的色差，且结构复杂。
- 更多网络解释与球面投影相关的网络解释 [注：此内容来源于网络，仅供参考]
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spherical surface projection：球面投影
球面谐波:spherical harmonics | 球面投影:spherical surface projection | 球形构造:Spherical conformation
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spherical projection：球面投影 球面投影
sphere 球面 圆球体 | spherical projection 球面投影 球面投影 | spline 样条曲线 云形线
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spherical projection：球面投影
球面三角学:Spherical Trigonometry | 球面投影:Spherical Projection | 球形容器:Spherical vessel
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spherical projection：球面投影 球面投影 kHu开思网
sphere 球面 圆球体 kHu开思网 | spherical projection 球面投影 球面投影 kHu开思网 | spline 样条曲线 云形线 kHu开思网
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transverse stereographic projection：横球面投影
横麦卡托投影 transverse Mercator projection | 横球面投影 transverse stereographic projection | 横球心投影 transverse gnomonic projection
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Universal Polar Stereographic projection：通用极球面投影
通用横墨尔卡投影 U niversal Transverse Mercator projection | 通用极球面投影 Universal Polar Stereographic projection | 通用极球面投影 UPS
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Universal Polar Stereographic projection, UPS：通用横球面投影
04.154 通用横墨卡托投影 Universal Transverse Mercator projection,UTM | 04.155 通用横球面投影 Universal Polar Stereographic projection, UPS | 04.156 标准纬线 standard parallel
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stereographic chart：球面投影图
球面投影 stereographic projection | 球面投影圖 stereographic chart | 球面透鏡 spherical lens
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UPS：通用极球面投影
通用极球面投影(UPS)栅格系统应用与南极地区时,原点就为南极点. 基准线类似与北极地区的情况. 这个栅格参考系统使用了统一横向墨卡托投影(UTM)栅格和通用极球面投影(UPS)栅格. 这些栅格系统的坐标值需要使用15位数字来表示.
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azimuthal orthomorphic projection：球面投影
azimuthal map projection 方位投影 | azimuthal orthomorphic projection 球面投影 | azimuthal projection 方位投影; 方位投影法