opencv 圖像傅里葉變換

傅里葉變換 dft = cv.dft(np.float32(img),flags = cv.DFT_COMPLEX_OUTPUT) 傅里葉逆變換 img_back = cv.idft(f_ishift)python 實驗：將圖像轉換到頻率域，低通濾波，將頻率域轉回到時域，顯示圖像web import numpy as np import cv2 as cv from matplotlib impo

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