从STEREO/EUVI A、B和SOHO/EIT的三个有利位置进行的二维和三维极烟羽分析
2D and 3D Polar Plume Analysis from the Three Vantage Positions of STEREO/EUVI A, B, and SOHO/EIT
摘要：
极地羽流被看作是从太阳极地开始的细长物体。在这里，我们分析这些对象从一系列的图像同时采取的三个航天器望远镜STEREO/EUVI A和B，SOHO/EIT。我们建立了一种方法，能够自动识别羽状流在太阳EUV图像接近的肢体在1.01 - 1.39 R，以研究其时间演化。这种烟羽识别方法是基于多尺度Hough小波分析。然后，两种方法来确定他们的三维定位和结构进行了讨论：第一，层析成像使用的过滤反投影和包括太阳的差分旋转，第二，传统的立体三角测量。我们表明，层析成像和立体视觉是互补的研究极柱。我们还表明，这种系统的二维识别和三维重建的方法是非常适合的，一方面，单独识别羽流，另一方面，分析羽流和羽流间区域的分布。最后，对计算结果进行了讨论，重点讨论了羽流的位置及其横截面积。
英文摘要：
Polar plumes are seen as elongated objects starting at the solar polar regions. Here, we analyze these objects from a sequence of images taken simultaneously by the three spacecraft telescopes STEREO/EUVI A and B, and SOHO/EIT. We establish a method capable of automatically identifying plumes in solar EUV images close to the limb at 1.01 - 1.39 R in order to study their temporal evolution. This plume-identification method is based on a multiscale Hough-wavelet analysis. Then two methods to determined their 3D localization and structure are discussed: First, tomography using the filtered back-projection and including the differential rotation of the Sun and, secondly, conventional stereoscopic triangulation. We show that tomography and stereoscopy are complementary to study polar plumes. We also show that this systematic 2D identification and the proposed methods of 3D reconstruction are well suited, on one hand, to identify plumes individually and on the other hand, to analyze the distribution of plumes and inter-plume regions. Finally, the results are discussed focusing on the plume position with their cross-section area.
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