第一步先用pip安装opencv-python模块

jovyan@re5ki1bmb1fc-job-q7hv8:~$ pip install opencv-python

Collecting opencv-python

  Downloading opencv_python-4.4.0.42-cp38-cp38-manylinux2014_x86_64.whl (49.4 MB)
     |████████████████████████████████| 49.4 MB 25.3 MB/s
Requirement already satisfied: numpy>=1.17.3 in /opt/conda/lib/python3.8/site-packages (from opencv-python) (1.19.1)
Installing collected packages: opencv-python
Successfully installed opencv-python-4.4.0.42
jovyan@re5ki1bmb1fc-job-q7hv8:~$
jovyan@re5ki1bmb1fc-job-q7hv8:~$
jovyan@re5ki1bmb1fc-job-q7hv8:~$
jovyan@re5ki1bmb1fc-job-q7hv8:~$ ls
Untitled.ipynb  work
jovyan@re5ki1bmb1fc-job-q7hv8:~$ docker ps
bash: docker: command not found
jovyan@re5ki1bmb1fc-job-q7hv8:~$ docker info
bash: docker: command not found
jovyan@re5ki1bmb1fc-job-q7hv8:~$ ps
  PID TTY          TIME CMD
   90 pts/1    00:00:00 bash
  113 pts/1    00:00:00 ps
jovyan@re5ki1bmb1fc-job-q7hv8:~$ ps
  PID TTY          TIME CMD
   90 pts/1    00:00:00 bash
  114 pts/1    00:00:00 ps
jovyan@re5ki1bmb1fc-job-q7hv8:~$ ps aux
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
jovyan       1  0.0  0.0   2492   384 pts/0    Ss   05:13   0:00 tini -g -- start-notebook.sh
jovyan       6  1.6  0.0 220372 60204 pts/0    Sl+  05:13   0:02 /opt/conda/bin/python /opt/conda/bin/jupyter-notebook
jovyan      28  0.9  0.1 2502508 132700 ?      Ssl  05:13   0:01 /opt/conda/bin/python -m ipykernel_launcher -f /home/jovyan/.
jovyan      90  0.4  0.0   7232  2420 pts/1    Ss   05:13   0:00 /bin/bash
jovyan     115  0.0  0.0   8872  1556 pts/1    R+   05:16   0:00 ps aux
jovyan@re5ki1bmb1fc-job-q7hv8:~$

其次传一张我们需要的图片到目录

然后写入代码

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

img = cv2.imread('1.png')
img2 = img[:,:,::-1]
plt.imshow(img)

然后运行结果如图

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

    img = cv2.imread('1.png')
    img2 = img[:,:,::-1]
    plt.imshow(img2)