一种基于OpenACC的遥感影像正射纠正快速实现方法  

A Fast Implementation Method of Remote Sensing Image Ortho-rectification Based on OpenACC

作　　者：莫德林[1] 戴晨光[1] 张振超[1] 胡玲 

机构地区：[1]信息工程大学地理空间信息学院,郑州450001

出　　处：《影像技术》2014年第2期47-49,27,共4页Image Technology

摘　　要：利用CUDA语言移植旧程序时需要重新设计算法,花费较多的时间,效率不高。针对这一问题,本文在分析正射纠正算法并行性的基础上,提出一种基于OpenACC的遥感影像正射纠正快速实现方法,并与基于CUDA的正射纠正方法进行对比。通过正射纠正实验表明,OpenACC能通过对源代码的较小改动将其移植到GPU中,获得一定的加速比,其可移植性好,代码开发效率较高。Algorithms need to be redesigned when using CUDA to transplant old programs, This will cost a long period of time, which leads to a low efficiency. Aiming at solving this problem, a fast implementation method of remote sensing image ortho-rectification based on OpenACC is proposed, and compared with ortho-rectification based on CUDA in this paper. Ortho-rectification experiments show that OpenACC can transplant program to the GPU with small changes, and get a speed up ratio. The portability is good, and the efficiency of code development is high.

关 键 词：OpenACC CUDA 正射纠正 加速比 

分 类 号：P231[天文地球—摄影测量与遥感]