关键词: 倾斜摄影测量, 实景三维模型, 集群, 并行计算, 子块划分

Abstract:

The emergence of computer cluster technology provides a solution to the shortage of computing resources encountered in 3D automatic modeling of tilted photogrammetry. This paper discusses two application patterns of cluster in 3D modeling:cluster based on physical parallel computing and cluster based on logic parallel computing. The process of 3D modeling of real scene in ContextCapture under the cluster mode of logical parallel computing is expounded. Five principles of subdivision in this cluster are proposed:the principle of the starting and landing points, the principle of flying height, the principle of building density/vegetation density, the principle of maximum calculation and the principle of line angle. And the accuracy of the sub region is effectively controlled. Finally, this paper uses a number of common PC machines in the laboratory to achieve a three-dimensional cluster modeling in a certain area. The results show that the method automatically establishes the model accuracy to meet the requirement of the survey area, and can effectively speed up the automation modeling speed and reduce the production cost.

Key words: oblique photogrammetry, real 3D model, cluster, parallel computing, sub-block partition