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Fig. 4

image

Five-level wavelet decomposition for NOAA AR # 10 488, 28 October 2003, 01:35. The fifth-level decomposition is visualized in the uppermost left corner, with subsequently lower levels to the bottom right; as reference, the horizontal (H), vertical (V), and diagonal (D) images are labeled for the first and second level with the same structure in the subsequent levels. The pixel values (wavelet coefficients) can be considered unitless, with darker pixels representing higher values, scaled across all levels. The entire width of the image represents 211.5 Mm × 211.5 Mm; each subsequent decomposition reduces each dimension by half.

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