航测法提取动态三维深度信息

目前提取三维信息,重建三维图像的研究很多,本文叙述的是仅用一台摄像机利用航测法来提取动态三维信息的方法。假设物体不动,移动摄像机。在移动摄像机前后,即在摄像机移动的相邻两点,可以得到模型的像片对,通过此像片对来实现同名点交会,求得未知点的三维深度信息。为此,首先要进行绝对定向,计算像片元素和确定各个坐标系。然后实现不依赖像片角定向元素的同名点空间交会;或实现利用对应轴系上的坐标进行空间交会。在此基础上,笔者充分利用先验条件和专家知识来确定飞机模型上的同名点,初步得到了飞机模型的轮廓侧视图。

Dynamic 3-D Depth Information Acquisition by Aerophotographic Method

Recently, there are many researchers working on the reconstruction of 3-D images. This paper describes the way of dynamic 3-D information acquisition by aerophotographic method. Only one camera is used. It is assumed that the model is fixed and the camera is movable. Between the two points of camera motion, a couple of model images are obtained. The intersection of the corresponding points in space can be realized to acquire the dynamic 3-D depth information from the image couple. Thus, the absolute orientation, the image element computation and the coordinates should be determined. Then the space intersection of the corresponding points without angle orientation elements and the space intersection with the coordinates on the cooresponding axis system may be obtained. On this basis, the priori conditions and the expert knowledge have been used for seeking the corresponding points. Finally, a model side outline is obtained.