We present a method for determining surface flows from solar images based upon optical flow techniques. We apply the method to sets of images obtained by a variety of solar imagers to assess its performance. The opflow3d procedure is shown to extract accurate velocity estimates when provided perfect test data and quickly generates results consistent with completely distinct methods when applied on global scales. We also validate it in detail by comparing it to an established method when applied to high-resolution datasets and find that it provides comparable results without the need to tune, filter or otherwise preprocess the images before its application.

中文翻译：

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一种用于从数字图像确定速度的光谱光流方法。


我们提出了一种基于光流技术从太阳图像确定表面流的方法。我们将该方法应用于各种太阳成像仪获得的图像集，以评估其性能。 opflow3d程序在提供完美的测试数据时可以提取准确的速度估计，并在全球范围内应用时快速生成与完全不同的方法一致的结果。我们还通过将其与应用于高分辨率数据集时的既定方法进行比较来详细验证它，并发现它提供了可比的结果，而无需在应用之前调整、过滤或以其他方式预处理图像。