cv2 imshow 不显示图像并锁定 kernel

Question

I run my code which is locking up my kernel. I'm in a jupyter notebook using anaconda. The kernel indicator (Python 3 (ipykernel)) circle is solid and stays that way. I uninstalled and reinstalled opencv-python with pip. I'm not sure what is(or isn't)going on. My file is in the same directory as my JNB (so, no file not found in directory issue)

Here is my code:

import cv2

img = cv2.imread('galaxy.jpg', cv2.IMREAD_GRAYSCALE)
print(type(img))
print(img)
print(img.shape) # (1485, 990)
print(img.ndim) # 2 because grayscale

cv2.imshow('Galaxy', img)
cv2.waitKey(0)
cv2.destroyAllWindows()

This is the output I do get:

<class 'numpy.ndarray'>
[[14 18 14 ... 20 15 16]
 [12 16 12 ... 20 15 17]
 [12 13 16 ... 14 24 21]
 ...
 [ 0  0  0 ...  5  8 14]
 [ 0  0  0 ...  2  3  9]
 [ 1  1  1 ...  1  1  3]]
(1485, 990)
2

But no display of the image? Can anyone tell me what I'm doing wrong?

Answer 1

This worked on jupyter notebook:

import cv2
import matplotlib.pyplot as plt
img = cv2.imread("galaxy.jpg")
plt.imshow(img)
plt.show()