【摘要】 针对现有核线影像生成方法计算量大、计算复杂等缺点,该文提出了一种基于四元数的核线影像生成算法,建立了四元数核线影像模型。推导了四元数共面条件方程线性化误差方程式,在此基础上依次利用两个四元数消除基线分量,实现了原始影像到核线影像的坐标变换;相比于传统欧拉角核线排列算法,四元数在实现姿态描述唯一性的同时避免了繁琐的三角函数计算。利用航空影像和无人机影像进行实验,建立的核线影像上下平均视差在0.4个像素以内,核线影像前方交会的平面和高程精度优于1m,结果表明四元数核线影像模型基本上消除了上下视差,能够满足摄影测量立体观测的要求。更多还原

【Abstract】 Aiming at the shortcomings of heavy computation and complex computation in the existing epipolar line array algorithms,an array algorithm for epipolar line based on quaternion was proposed and a model for quaternion epipolar images was established in this paper.After the quaternion coplanarity condition equation linearization error equation was deduced,two quaternions were applied to eliminate the baseline component,and the coordinate transformation from original image to epipolar image was obtained.Compared with the traditional Euler angle epipolar alignment algorithm,quaternion could avoid tedious trigonometric function calculation with the realization of the uniqueness in the description of the attitude at the same time.Experiments were conducted by the application of aerial images and UAV images,the mean vertical parallax of epipolar images thus established was within 0.4pixel;the planar and vertical accuracy of forward intersection for epipolar images was better than 1m.Test results showed that vertical parallax was basically eliminated by the epipolar line array algorithm model based on quaternion,which could meet the requirements of stereoscopic observation in photogrammetry.更多还原