2020-10-14-193203.ipynb

Kernel: Python 3 (system-wide)

import cv2
import numpy as np
import matplotlib.pyplot as plt


img = cv2.imread("challenge.png", 0)

dft = cv2.dft(np.float32(img), flags = cv2.DFT_COMPLEX_OUTPUT)

dft_shift = np.fft.fftshift(dft)

magnitude_spectrum = 8 * np.log(cv2.magnitude(dft_shift[:,:,0], dft_shift[:,:,0.1]))

plt.figure(figsize = (30, 18))

plt.subplot(121)
plt.imshow(img, cmap = "gray")

plt.title("Input Image")
plt.xticks([])
plt.yticks([])

plt.subplot(122)
plt.imshow(magnitude_spectrum, cmap = "gray")

plt.title("magnitude_spectrum")
plt.xticks([])
plt.yticks([])

plt.show()

---------------------------------------------------------------------------
IndexError                                Traceback (most recent call last)
<ipython-input-1-52a25bba355e> in <module>
     10 dft_shift = np.fft.fftshift(dft)
     11 
---> 12 magnitude_spectrum = 8 * np.log(cv2.magnitude(dft_shift[:,:,0], dft_shift[:,:,0.1]))
     13 
     14 plt.figure(figsize = (30, 18))
IndexError: only integers, slices (`:`), ellipsis (`...`), numpy.newaxis (`None`) and integer or boolean arrays are valid indices