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为了更好地满足智慧城市建设中对自动获取建筑物精确檐口高的需求,提出了一种基于极大值边缘信息量的高程初值提取方法,实现了二维线划图与边缘影像在檐口位置的初始套合,在此基础上通过广义点摄影测量迭代求解精确檐口高。实验结果表明,该方法可以全自动地恢复二维线划图中的建筑物檐口高,达到分米级精度,不仅提供了一种生产三维线划图的技术方法,而且对于建筑物三维建模、人工地物自动提取等技术的发展和进步也具有推动意义和参考价值。
In order to meet the demand of obtaining the accurate cornice height automatically in the construction of smart city, a method of initial value elevation based on the information of maximum edge is proposed, which realizes the two-dimensional line drawing and edge image in cornice Position the initial set, on this basis, through the generalized point photogrammetric iteration to solve the exact cornice height. The experimental results show that this method can automatically restore the cornice height of the building in the two-dimensional line drawing and achieve the accuracy of decimeter level. This method not only provides a technical method for producing the three-dimensional line drawing, , Artificial objects such as automatic extraction technology development and progress also has a meaning and reference value.