利用图形处理单元实现自动数字曲面模型生成

Dirk van der Merwe, J. Meyer
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引用次数: 1

摘要

数字地表模型(DSM)在地球科学中有着广泛的应用。它为各种地质研究和其他应用提供了信息。自动生成DSM的方法有很多,每一种方法都有自己的优缺点,没有一种是完美的。尽管迄今为止有很多算法可以生成dsm,但这是一个计算复杂的计算,并且往往需要一些时间才能完成。为了实现更快的dsm,在图形处理单元上实现了一种算法。该平台大大提高了处理速度,但也存在一些缺点;也就是说,不支持双精度浮点值,有限的内存和算法必须适应流处理器环境。速度性能提高900%,而精度的降低可以忽略不计。GPU确实为计算广泛的数字表面建模应用程序提供了更有效的平台。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Towards automatic Digital Surface Model generation using a Graphics Processing Unit
Digital Surface Models (DSM) are widely used in the earth sciences. It provides information for various geological studies and other applications. There are a number of methods for automatic DSM generation, each of which has its own strengths and weaknesses, none of which are perfect. Even though there are plenty of algorithms to date which can generate the DSMs, it is a computationally complex calculation and does tend to take some time to complete. In order to achieve faster DSMs, an algorithm was implemented on a Graphics Processing Unit. This platform greatly improves the processing speed but does have some drawbacks; namely, no support for double precision floating point values, limited memory and algorithms has to be adapted to be usable in a stream processor environment. A speed performance increase of 900% was obtained while having a negligble decrease in accuracy. The GPU does offer a more efficient platform for computationally extensive digital surface modelling applications.
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