如果物体通过几何变换而被放置在世界坐标系中，比如通过平移和旋转，那么视图跟踪他在世界坐标系中位置变换的轨迹可能会是一个艰难的工作。
If the object is positioned in the world through geometric transformations, such as translations and rotations, then keeping track of its position in world coordinates can be a hard task.
它在底层采用特征依赖图保存数据模型，中层用细胞元模型作几何模型，在用户层用视图模型表示。
It USES FDG as data model, cell-based model as geometric model, and view model as user interface, but it is more complex than the former system based on parameter and history.
在底层它用特征依赖图作为数据模型，在中层用细胞元模型作几何模型，在用户层用视图模型表示。
It USES feature dependent graph as data model, cell-based model as geometric model, and view model as user interface, but it is more complex than the former system based on parameter and history.
单视图测量理论主要是利用了射影几何中的交比不变性来计算图像上点的三维坐标。
Single view metrology compute the 3d coordinate of a point based on the projective geometry's characteristic of cross-ratio invariability.
基于图像的视图插补技术涉及到多视图几何中的多参数估计、图像匹配等。
So far, the algorithms of view interpolation based on images are involved in the estimation of multi parameters and image matching under multiple view geometry.
通过建立的道路模型，根据道路的几何约束关系以及行业标准，重建出整个道路的立体视图，从而测出障碍物的距离。
On the road modeling, according to road geometry restriction and industry standards, 3d road model is reconstructed and the distance of obstacle is calculated.
本文介绍一种不受灭点远近限制的成角透视图法，并对其进行几何论证。
This paper introduces a method that we can apply it to draw angular perspective without view points, and it demonstrates this method according to the geometric principles.
文中利用射影几何中射线比的特殊性质，解决了透视灭点在图板外的透视图画法。
According to the nature of projective scale, it has solved the problem of drawing a cars perspective when perspective vanishing point is out of the drafting board.
文中利用射影几何中射线比的特殊性质，解决了透视灭点在图板外的透视图画法。
According to the nature of projective scale, it has solved the problem of drawing a cars perspective when perspective vanishing point is out of the drafting board.
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