Algorithm 1 Suppression of the batwing effect in microstructure measurement

(i)Generate the standard deviation image from the original measurement data; (ii)Select an appropriate batwing range based on the standard deviation image; (iii)Automatically determine the window size of the filtration: when the center data are not within the batwing range, use the default size, 3; when the center data are within the batwing range, the size will change with the alteration of the center data position; (iv)Set a threshold; when the center data are greater than (less than) this threshold, set the matrix values smaller than (larger than) this threshold to zero; (v)Sort and take the median of the non-zero data in the filtering matrix; (vi)Iterate through all data points to obtain the filtered data end