在照相机、摄像机内部参数未知的情况下,提出了一种新的由单幅二雏投影图像来进行空间定位的方法,即采用目标上共面四线与其在二维图像上投影相匹配的策略,来实现目标的定位.其基本步骤包括:图像预处理；用Prewitt算子提取边缘；通过基于轮廓特征和拓扑关系的区域分割方法来确定要处理的图像区域；对相机内参数进行标定；实现二维图像的空间测距.实验结果表明,所提出的算法速度快、空间定位精度较高.%This paper presents a target spatialization algorithm based on a two-dimensional image, without knowing the parameters of the camera. It is on the basis of four coplanar lines on the object matching with their perspective image. The basic steps include image preprocessing, edge detection by using Prewitt operator, determination of the image region based on contour feature and the topological relations, demarcation of the parameters of the camera and realization of the two-dimensional spatial location. Experimental results show that the method is faster and has higher precision.
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