SOHO LASCO C2/C3 dataset for training CNN network to classify CME images

This dataset is downloaded from the SOHO LASCO CME CATALOG (SOHO LASCO CME CATALOG - CDAW DATA CENTER (nasa.gov)).We manage to acquire the CME event records (including when the CME appears, ends and its remark) from the CDAW CME catalog websites and download every day running-difference images of LASCO C2 and C3 coronagraph from 2013 to 2018. According to the record of each CME event, an iteration is performed over each image. If the exposure time of an image is between the appearing time and ending time of an entry from the records, the image is labeled with the corresponding remark of that entry. All images are carefully checked and images with distortions or abnormalities will be removed from dataset to ascertain the quality of the images. The images are 512*512 image files with pixel values ranging in [0,255].

本数据集源自SOHO LASCO日冕物质抛射（Coronal Mass Ejection，CME）目录（SOHO LASCO CME CATALOG - CDAW DATA CENTER (nasa.gov)）。我们从CDAW CME目录网站成功获取了CME事件记录（包含CME的出现时刻、结束时刻及其备注信息），并下载了2013年至2018年间LASCO C2与C3日冕仪的每日逐差图像。针对每一条CME事件记录，我们对所有图像逐一遍历匹配：若某张图像的曝光时间处于该记录的出现时刻与结束时刻之间，则将该图像标注为对应事件的备注信息。随后，我们对所有图像开展严格质检，剔除存在畸变或异常的图像，以保障数据集的图像质量。本数据集包含的图像均为512×512像素的文件，像素值取值范围为[0, 255]。

搜集汇总

背景与挑战

背景概述

该数据集用于训练CNN网络分类CME图像，包含2013-2018年LASCO C2/C3日冕仪的标记图像，经过严格质量筛选，图像尺寸统一为512*512像素。