网站首页  英汉词典

请输入您要查询的英文单词:

 

单词 Perspective transform
释义

Perspective transform

中文百科

三维投影 3D projection

(重定向自Perspective transform)

三维投影是将三维空间中的点映射到二维平面上的方法。由于目前绝大多数图形数据的显示方式仍是二维的,因此三维投影的应用相当广泛,尤其是在计算机图形学,工程学和工程制图中。

英语百科

3D projection 三维投影

(重定向自Perspective transform)


\begin{bmatrix}
   \mathbf{d}_x \\
   \mathbf{d}_y \\
   \mathbf{d}_z \\
\end{bmatrix}=\begin{bmatrix}
   1 & 0 & 0  \\
   0 & {\cos ( \mathbf{- \theta}_x ) } & { - \sin ( \mathbf{- \theta}_x ) }  \\
   0 & { \sin ( \mathbf{- \theta}_x ) } & { \cos ( \mathbf{- \theta}_x ) }  \\
\end{bmatrix}\begin{bmatrix}
   { \cos ( \mathbf{- \theta}_y ) } & 0 & { \sin ( \mathbf{- \theta}_y ) }  \\
   0 & 1 & 0  \\
   { - \sin ( \mathbf{- \theta}_y ) } & 0 & { \cos ( \mathbf{- \theta}_y ) }  \\
\end{bmatrix}\begin{bmatrix}
   { \cos ( \mathbf{- \theta}_z ) } & { - \sin ( \mathbf{- \theta}_z ) } & 0  \\
   { \sin ( \mathbf{- \theta}_z ) } & { \cos ( \mathbf{- \theta}_z ) } & 0  \\
   0 & 0 & 1  \\
\end{bmatrix}\left( {\begin{bmatrix}
   \mathbf{a}_x  \\
   \mathbf{a}_y  \\
   \mathbf{a}_z  \\
\end{bmatrix} - \begin{bmatrix}
   \mathbf{c}_x  \\
   \mathbf{c}_y  \\
   \mathbf{c}_z  \\
\end{bmatrix}} \right)

This representation corresponds to rotating by three Euler angles (more properly, Tait–Bryan angles), using the xyz convention, which can be interpreted either as "rotate about the extrinsic axes (axes of the scene) in the order z, y, x (reading right-to-left)" or "rotate about the intrinsic axes (axes of the camera) in the order x, y, z (reading left-to-right)". Note that if the camera is not rotated (\mathbf{\theta}_{x,y,z} = \langle 0,0,0\rangle), then the matrices drop out (as identities), and this reduces to simply a shift: \mathbf{d} = \mathbf{a} - \mathbf{c}.

随便看

 

英汉网英语在线翻译词典收录了3779314条英语词汇在线翻译词条,基本涵盖了全部常用英语词汇的中英文双语翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2024 encnc.com All Rights Reserved
更新时间:2025/6/17 20:46:51