GPU用于高光谱数据高性能计算的应用实践与分析

VALIDATION AND ANALYSIS OF HIGH PERFORMANCE COMPUTATION ON HYPERSPECTRAL IMAGERY BASED ON GPU

高光谱遥感数据具有波段多、数据量大、处理复杂等特点,基于GPU的高性能计算在遥感领域得到了快速发展,为高光谱数据的快速处理提供了硬件和技术条件。采用GPU对高光谱遥感数据常用的SAM、PPI等处理算法进行应用实验,验证基于GPU的高光谱遥感数据快速处理技术。实验采用新疆东天山地区的一景星载Hyperion数据,利用支持IDL开发语言的GPULib、CUDA运行时API库进行算法效率的验证,结果表明,基于GPU的高光谱数据处理效率比常规的多核CPU主机处理效率有较大提升,具有一定的应用推广价值。

Hyperspectral imagery has many characteristics,such as plenty of bands,large volume of data,high computing complexity. In recent years,high performance computation has been making great progress in remote sensing based on GPU,providing the hardware and technical conditions for the rapid processing of hyperspectral data. We implemented the experiments on a hyperspectral image which was obtained by Hyperion of EO-1 satellite in East Tianshan area,Xinjiang,using SAM and PPI algorithms based on CPU and GPU,trying to study the fast processing technology on hyperspectral data.. Actually the GPULib and CUDA API were used through IDL language and the data was tested by different algorithms. The results show that the processing efficiency of hyperspectral data in GPU is greater than CPU and the technology can be used in remote sensing image processing.