Research on the Velocity Field of the Sun\'s Surface

• 1、College of Computer Science and Electronic Engineering, Hunan University，Changsha 410082

Abstract：The solar surface velocity field is an important way to study solar activity. By analyzing the solar surface velocity field, the upcoming solar activity on the solar surface can be predicted. At present, most of the research on solar observation starts from the solar spectrum, but the solar spectrum data has problems such as low resolution, instability, and easy distortion, which lead to poor practicability. With the development of observation technology, solar images have been able to present high-resolution and continuous observation features, and have gradually become important data for analyzing solar activity. Therefore, from the perspective of image processing, this paper uses the HS optical flow method and the LK optical flow method based on pyramid layering to process the solar image to calculate the solar surface velocity field, and uses the image structure similarity index to verify the two methods. effectiveness of the method. The experimental results show that both the HS optical flow method and the LK optical flow method based on the pyramid layer can calculate the solar surface velocity field, and the calculation result of the LK optical flow method based on the pyramid layer is more accurate.

Keywords： solar surface velocity field optical flow method solar activity