一种免控制点的近景影像绝对定向算法

在摄影测量绝对定向算法中要确定七个绝对定向元素,因此需要布设足够多的物方控制点。当近景摄影测量不需要确定被摄对象在空间的绝对位置时,采用传统的绝对定向方法就会增加像片控制测量工作量,从而降低工作效率的问题。提出了一种无控制点的近景摄影测量绝对定向算法。该方法对有铅垂方向的被摄物体,只需现场量测被摄物体上任一沿被测对象走向线段的长度和被摄物体的走向,即可确定像对构建模型的空间相对方位。实验结果表明,该算法可达到厘米级的定向精度。

Close-range image of a free control point absolute prientation algorithm

In the photographic measurement of absolute orientation algorithm to determine the seven absolute orientation elements, therefore need to be emplaced enough object control point.When a close-range photography measurement does not need to determine the subject in the space of the absolute position, the traditional method of absolute orientation will increase the workload of photo control survey so as to reduce the work efficiency, this paper presents a kind of control points in close range photogrammetry absolute orientation algorithm.The method only needs to the field measured object of one along the housing to the length of a line segment and the object can be determined to, like to construct the model of the space relative orientation.The experimental results show that, the algorithm can achieve the precision of centimeter level.