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Forman相位校正算法的改进与实现

DOI: 10.6046/gtzyyg.2013.03.17, PP. 97-101

Keywords: Forman算法,相位校正,光谱复原处理,图形处理器(GPU)技术,离散傅里叶变换(DFT)

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Abstract:

针对直接采用Forman相位校正算法实现HJ-1A高光谱数据实时光谱复原处理系统过程中遇到的算法复杂、运算量大以及运算效率低的问题,提出了改进的Forman算法。该算法简化了相位数据的计算,并利用复数序列傅里叶变换的性质和实序列傅里叶变换的共轭对称性优化了计算过程。在分析改进前后算法关键步骤的浮点数运算量的基础上,以HJ-1A高光谱数据为实验对象,基于图形处理器(graphicprocessingunit,GPU)实现了改进的Forman算法。结果表明:在相同计算精度的情况下,改进的Forman算法运算速度提高了11.86%,为HJ-1A高光谱数据实时光谱复原处理系统的实现提供了行之有效的方法。

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