基于多CPU的摄影测量空三并行计算研究

发布时间：2018-02-01 02:56

本文关键词： 航带法单航带空中三角测量航带法区域网空中三角测量并行计算　出处：《北京建筑大学》2015年硕士论文　论文类型：学位论文

【摘要】：摄影测量发展至今已有百年历史,空中三角测量一直以来都是摄影测量中的关键步骤。在空中三角测量被大量研究的过程中,人们主要对如何获取像片高精度的外方位元素的问题进行了研究,提出了各种有效的理论和方法,如附加参数的光束法区域网平差、GPS/IMU辅助的联合平差、测量误差自动评估以及如何有效剔除粗差等理论发展迅速。尽管方法多种多样,但都是为了进一步提升空中三角测量的精度、解算速度和获取测区地理数据的效率。本文着重研究了单航带解析空中三角测量以及航带法区域网空中三角测量的原理和解算步骤,对多核架构和多核并行技术以及多核并行编程模型进行了简要介绍。随着计算机多核技术的发展,以及对越来越高的计算能力的需求,对算法设计人员以及程序编写人员提出了新的要求,适应多核架构的并行化编程思想逐渐得到推广。为了充分利用多核计算机的计算资源,进一步提高空中三角测量的解算速度,达到空中三角测量的实时或准实时解算的目的,减轻作业人员的工作量,本论文在充分研究航带法单航带和区域网空中三角测量理论和方法的基础上,结合并行编程思想,对上述两种空三模型的并行化算法进行了研究,对有并行需求的热点部分进行了并行化算法设计,提出了分别针对单航带和区域网空中三角测量平差的并行化编程算法。结合并行化编程模型,把原有的空中三角测量串行程序改造成为并行程序。通过对原始数据的解算和对结果的分析,肯定了并行化编程算法的可行性和有效性,一定程度地提升了程序的解算速度。
[Abstract]:Aerial triangulation has been a key step in photogrammetry since it has been developed for a hundred years. People mainly study how to obtain the high-precision external azimuth elements of the image, and put forward various effective theories and methods, such as the adjustment of the regional network of the beam method with additional parameters. The theory of GPS/IMU aided joint adjustment, automatic evaluation of measurement error and how to effectively eliminate gross error have developed rapidly. Although there are many methods, they are all aimed at further improving the accuracy of aerial triangulation. In this paper, the principle and calculation steps of single zone analytic aerial triangulation and strip method area-net aerial triangulation are studied. The multi-core architecture, multi-core parallel technology and multi-core parallel programming model are briefly introduced. With the development of computer multi-core technology, and the demand for higher and higher computing power. New requirements for algorithm designers and programmers are put forward, and the idea of parallel programming adapted to multi-core architecture is gradually popularized, in order to make full use of the computing resources of multi-core computers. Further improve the calculation speed of aerial triangulation, achieve the goal of real-time or quasi-real-time aerial triangulation, reduce the workload of operators. In this paper, based on the full study of the theory and method of triangulation of single flight belt and area network, combined with parallel programming, the parallelization algorithms of the above two space-three models are studied. The parallelization algorithm for hot spots with parallel requirements is designed, and a parallel programming algorithm for triangulation adjustment of single belt and area network is proposed, which combines the parallel programming model. The original serial program of aerial triangulation is transformed into a parallel program. The feasibility and effectiveness of the parallel programming algorithm are confirmed through the calculation of the original data and the analysis of the results. The calculation speed of the program is improved to some extent.
【学位授予单位】：北京建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P231

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