普通数码相机属于非量测相机，影像的畸变差较大，但摄影测量的量测算法具有一定的适应性。相对定向是摄影测量关键算法，对连续迭代法相对定向和直接解法相对定向进行了研究，并用两种方法对其质量进行评价。通过工程应用总结出非量测相机近景影像相对定向解算的特殊性，提出了两种定向方法联合计算相对定向元素的方法。

Ordinary digital camera is a kind of nonmetric camera, it has large image distortion but the method for photogrammetric measurement has a certain adaptive. The relative orientation is the key measurement of aerial photogrammetry, the method of successive iterative relative orientation and the direct relative orientation their quality have been studied and evaluated. Summing up the particularity of nonmetric camera’s relative orientation of closerange digital imagery in engineering application, we proposed two methods of joint calculation of the relative directional orientation elements.