扩展共线方程结合车载组合全景相机影像区域网平差
发布时间：2019-06-12 20:20
【摘要】：利用扩展共线方程实现组合相机单片影像的空中三角测量,通过该方法来提高全景影像的定位精度。由于组合全景相机中各子相机刚性固定,相机间的相对位姿参数可以精确标定,因此利用扩展共线方程模型,可以将组合全景相机的构像单元从单个子相机影像扩展为整个组合相机获取的多张影像。与已有的球模型方法,包括球理想模型和球严密模型方法相比,本文所用的扩展共线方程方法使用各子相机影像像点作为观测值,避免了球模型方法中由各子相机摄影中心不重合导致的球模型投影误差和摄站内重叠区域融合误差。试验结果表明:与球模型方法相比,本文方法无需模型投影和摄站内重叠区域融合等繁琐的处理过程,避免了由其引起的精度损失,保证了空三网稳定性的同时提高了定位精度。
[Abstract]:The aerial triangulation of the single-piece image of the combined camera is realized by using the extended co-linear equation, and the positioning accuracy of the panoramic image is improved by the method. Due to the rigid fixation of each sub-camera in the combined panoramic camera, relative pose parameters between the cameras can be accurately calibrated, and therefore, the image-forming unit of the combined panoramic camera can be extended from a single sub-camera image to a multi-image acquired by the whole combined camera by using an extended co-linear equation model. Compared with the existing ball model method, the method comprises the following steps of: using the image image points of each sub-camera as an observation value, And the spherical model projection error caused by the non-coincidence of the sub-camera shooting centers in the ball model method and the fusion error of the overlapping area in the shooting station are avoided. The experimental results show that, compared with the method of the ball model, the method of this paper does not need a complicated process such as the fusion of the model projection and the overlapping area in the camera station, so that the accuracy loss caused by the method is avoided, and the stability of the air-to-three network is ensured, and the positioning accuracy is improved.
【作者单位】： 武汉大学测绘学院;
【基金】：测绘地理信息公益性行业科研专项~~
【分类号】：P23;P207.2
本文编号：2498275
[Abstract]:The aerial triangulation of the single-piece image of the combined camera is realized by using the extended co-linear equation, and the positioning accuracy of the panoramic image is improved by the method. Due to the rigid fixation of each sub-camera in the combined panoramic camera, relative pose parameters between the cameras can be accurately calibrated, and therefore, the image-forming unit of the combined panoramic camera can be extended from a single sub-camera image to a multi-image acquired by the whole combined camera by using an extended co-linear equation model. Compared with the existing ball model method, the method comprises the following steps of: using the image image points of each sub-camera as an observation value, And the spherical model projection error caused by the non-coincidence of the sub-camera shooting centers in the ball model method and the fusion error of the overlapping area in the shooting station are avoided. The experimental results show that, compared with the method of the ball model, the method of this paper does not need a complicated process such as the fusion of the model projection and the overlapping area in the camera station, so that the accuracy loss caused by the method is avoided, and the stability of the air-to-three network is ensured, and the positioning accuracy is improved.
【作者单位】： 武汉大学测绘学院;
【基金】：测绘地理信息公益性行业科研专项~~
【分类号】：P23;P207.2
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