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arXiv 1104.5580astro-ph.SR
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提高Hinode SOT Ca II H滤波图的精细结构可见性

Increasing the Fine Structure Visibility of the Hinode SOT Ca II H Filtergrams

E. Tavabi, S. Koutchmy

摘要:

我们提出了改进的所谓的Madmax(OMC)算子,选择在多个方向上计算的凸度的最大值在MatLab中重写的每个像素周围,是非常有效的模式识别。该算法的目的是跟踪明亮的头发状特征(例如,色球薄喷流或针状物)的太阳最终观测污染的噪音不同的来源。这个流行的空间算子在其绝对值具有最大值的最佳选择方向上使用二阶导数。因此,它使用受叠加噪声影响的所得强度信号的正性。使用测试人工生成的图像和真实的SOT(Hinode)图像来说明结果,以自行选择敏感参数来提高图像的可见性。

英文摘要:

We present the improved so-called Madmax (OMC) operator selecting maxima of convexities computed in multiple directions around each pixel rewritten in MatLab and shown to be very efficient for pattern recognition. The aim of the algorithm is to trace the bright hair-like features (for ex. chromospheric thin jets or spicules) of solar ultimate observations polluted by a noise of different origins. This popular spatial operator uses the second derivative in the optimally selected direction for which its absolute value has a maximum value. Accordingly, it uses the positivity of the resulting intensity signal affected by a superposed noise. The results are illustrated using a test artificially generated image and real SOT (Hinode) images are also used, to make your own choice of the sensitive parameters to use in improving the visibility of images.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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