基于GPU的太阳图像斑点重建技术实现

大气与环境光学学报 ›› 2020, Vol. 15 ›› Issue (2): 90-100.

基于GPU的太阳图像斑点重建技术实现

宣经纬1,2,3, 饶长辉1,2, 钟立波1,2, 田雨1,2

1中国科学院自适应光学重点实验室, 四川成都 610209; 2中国科学院光电技术研究所, 四川成都 610209; 3中国科学院大学, 北京 100049

出版日期:2020-03-28 发布日期:2020-03-23

Implementation of Solar Speckle Image Reconstruction Based on GPU

XUAN Jingwei1,2,3, RAO Changhui1,2, ZHONG Libo1,2, TIAN Yu1,2

1Key Laboratory of Adaptive Optics, Chinese Academy of Science, Chengdu 610209, China;
2 Institute of Optics and Electronics, Chinese Academy of Science, Chengdu 610209, China;
3 University of Chinese Academy of Sciences, Beijing 100049, China

Published:2020-03-28 Online:2020-03-23

摘要/Abstract

摘要： 在地基太阳观测中,光线在穿越大气层时会受到大气湍流的影响而导致图像扭曲、变形以致质量下降。为了消除或降
低大气湍流的影响,事后图像处理技术被用来获得高分辨力的太阳图像。基于斑点干涉法和斑点掩模的事后重建算
法可以获得高分辨力的图像,但由于计算复杂度高,难以满足实时性的要求。在讨论了算法原理的基础上,
使用CUDA并行计算架构实现了太阳斑点重建算法并行化。实验结果表明,在GPU环境下,一张TiO通
道2304 pixel$\times$1984 pixel像素大小的图像,可以在70 s内完成重建,相比运行在CPU上的串行程序,加速比可达7以上。

关键词: GPU, CUDA;图像重建;斑点干涉法;斑点掩模法;并行计算

Abstract: In ground-based solar observation, when the light passes through atmosphere, it will be affected by
atmospheric turbulence which will cause translation, distortion and blurring of the received image.
In order to eliminate or reduce the effects of atmospheric turbulence, post-image processing
technology was used to obtain high-resolution solar images. High-resolution image can be obtained
by post-facto reconstruction algorithm based on the speckle interferometry and speckle masking.
However, due to its complex calculation, the algorithm can not meet the requirement of real-time
detection. On the basis of the principle of the algorithm, solar speckle image reconstruction
algorithm has been parallelized by using CUDA parallel computing architecture in this research.
The experimental results show that a 2304 pixel$\times$1984 pixel image of TiO channel can be
reconstructed within 70 s under GPU environment. Compared with the program running on CPU, the speed-up radio can up to 7.

Key words: GPU, CUDA, image reconstruction, speckle interferometry, speckle masking, parallel computing

宣经纬, 饶长辉, 钟立波, 田雨, . 基于GPU的太阳图像斑点重建技术实现[J]. 大气与环境光学学报, 2020, 15(2): 90-100.

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