First do run these commands inside Terminal/CMD:

conda update anaconda-navigator  
conda update navigator-updater  

Then the issue for the instruction below will be resolved

For windows if you have anaconda installed, you can simply do

pip install opencv-python

or

conda install -c https://conda.binstar.org/menpo opencv

if you are on linux you can do :

pip install opencv-python

or

conda install opencv 

Link1 Link2

For python3.5+ check these links : Link3 , Link4

Update:
if you use anaconda, you may simply use this as well (and hence don't need to add menpo channel):

conda install -c conda-forge opencv
Answer from Hossein on Stack Overflow
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Roboflow
roboflow.com › use opencv › modulenotfounderror: no module named 'cv2'
ModuleNotFoundError: no module named 'cv2' (OpenCV)
The ModuleNotFoundError: no module named 'cv2' code indicates that your Python environment cannot find the OpenCV package.
Discussions

No module named cv2 although opencv has been installed already
I wanted to try the simple code ... re-installing opencv then running this code over and over again. My terminal on VSCode gets terminated by error No module named cv2 - none of my efforts helped. I am about to bang off my keyboard out of frustration. Could anyo...... More on discuss.pytorch.org
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0
October 9, 2025
How do I fix the issue moduleNotFoundError: No module named 'cv2' ?
it just seems that u are missing open cv all u need to do is install that it may be different depending on what u are using if u are using automatics repo, then it will probably be done from within the venv u can manually activate it from in cmd (cmd does not open in the folder by default so cd Your/StableDiffusion/path/here) by opening the activate.bat file found in stable-diffusion-webui (root) root\venv\Scripts\activate.batthen u will need to run pip install opencv-python else just install it from cmd with the same command pip install opencv-python More on reddit.com
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8
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October 16, 2022
Issue "ModuleNotFoundError: No module named 'cv2'" although opencv is installed
There was an error while loading. Please reload this page More on github.com
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15
May 22, 2024
Import error.Module not found error cv2.No module named cv2.Cant install open cv
Hello.I cant install open-cv in python 3.6.I need to import cv2, but i have module not found error: no module named cv2.Sudo apt-get install python-opencv and sudo apt-get install python3-opencv didnt help. pip install opencv-python command dint help too: Building wheel for opencv-python runs ... More on forums.developer.nvidia.com
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August 8, 2023
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PyPI
pypi.org › project › opencv-python
opencv-python · PyPI
There is no plugin architecture: all the packages use the same namespace (cv2). If you installed multiple different packages in the same environment, uninstall them all with pip uninstall and reinstall only one package. a. Packages for standard ...
      » pip install opencv-python
    
Published   Feb 05, 2026
Version   4.13.0.92
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PyTorch Forums
discuss.pytorch.org › torch.package / torch::deploy
No module named cv2 although opencv has been installed already - torch.package / torch::deploy - PyTorch Forums
October 9, 2025 - I wanted to try the simple code ... re-installing opencv then running this code over and over again. My terminal on VSCode gets terminated by error No module named cv2 - none of my efforts helped. I am about to bang off my keyboard out of frustration. Could anyo......
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GeeksforGeeks
geeksforgeeks.org › python › modulenotfounderror-no-module-named-cv2-in-python
Modulenotfounderror: No Module Named 'CV2' in Python - GeeksforGeeks
July 23, 2025 - This error specifies that the Python interpreter cannot find the OpenCV module in the current environment. To resolve this issue we needs to install OpenCV library using pip command.
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Reddit
reddit.com › r/stablediffusion › how do i fix the issue modulenotfounderror: no module named 'cv2' ?
r/StableDiffusion on Reddit: How do I fix the issue moduleNotFoundError: No module named 'cv2' ?
October 16, 2022 -

Normally I would just look up the solution rather than ask but from what I've seen, most people tend to have this issue differently, hence why I needed to ask, but also because I'm completely ignorant on this matter. I don't think I could fix this on my own unless I found an answer that told me how step by step.

Anyway, as I was installing diffusions for the very first time, the cmd kept giving me this issue repeatedly.

Relauncher: Launching...

Traceback (most recent call last):

File "scripts/webui.py", line 18, in <module>

import cv2

ModuleNotFoundError: No module named 'cv2'

As I've said above, since I'm ignorant on this topic, I have no idea what that really means or how to fix it so any help would really be great. I really don't want several hours to be wasted on this lol

Find elsewhere
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Raspberry Pi Forums
forums.raspberrypi.com › board index › programming › python
sudo python3 No module named 'cv2' - Raspberry Pi Forums
October 17, 2021 - Sun Jun 21, 2020 9:08 pm i did but i always got the same problem. it seems that it installed on /usr/local/lib/python3.5 not on /home/pi/.local/lib/python3.7/ I suspect a large part of the problem is caused by having two versions of Python 3 installed. I have no idea how to properly have two versions of Python3 installed and get pip installed packages working on one, the other, or both versions.
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GitHub
github.com › carla-simulator › carla › issues › 7683
Issue "ModuleNotFoundError: No module named 'cv2'" although opencv is installed · Issue #7683 · carla-simulator/carla
May 22, 2024 - Issue "ModuleNotFoundError: No module named 'cv2'" although opencv is installed#7683 · Copy link · Assignees · chris17012 · opened · on May 22, 2024 · Issue body actions · No description provided. Reactions are currently unavailable · PabloVD · No labels ·
Published   May 22, 2024
Author   chris17012
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NVIDIA Developer Forums
forums.developer.nvidia.com › robotics & edge computing › jetson systems › jetson nano
Import error.Module not found error cv2.No module named cv2.Cant install open cv - Jetson Nano - NVIDIA Developer Forums
August 8, 2023 - Hello.I cant install open-cv in python 3.6.I need to import cv2, but i have module not found error: no module named cv2.Sudo apt-get install python-opencv and sudo apt-get install python3-opencv didnt help. pip install…
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Python.org
discuss.python.org › python help
Installed opencv but having trouble importing it - Python Help - Discussions on Python.org
April 7, 2024 - Hi all, I recently downloaded anaconda python in order to work on an opencv personal project. I installed opencv using pip install opencv-contrib-python, where it installed successfully. Now, when I type import cv2 in …
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OpenCV Q&A Forum
answers.opencv.org › question › 224007 › no-module-named-cv2-but-opencv-is-installed
No module named 'cv2' but opencv is installed - OpenCV Q&A Forum
December 27, 2019 - I can't run the code, everytime I try to run it, i get this error message: Traceback (most recent call last): File "c:/Users/Marius/Entwicklung/local_light_absorber/opencv_test.py", line 1, in import cv2 ModuleNotFoundError: No module named 'cv2' I know there are already questions in this forum ...
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Core Electronics
forum.core-electronics.com.au › support
Python: import cv2 .. No module named 'cv2' - Support - Core Electronics Forum
January 11, 2026 - pip install opencv-python it says: Successfully installed numpy and opencv-python Good. I then run .py: import cv2 It says: No module named ‘cv2’ What am I doing wrong? :slight_smile:
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OpenCV
forum.opencv.org › python
No module named cv2 after installed the opencv-python - Python - OpenCV
April 1, 2025 - I create a new env and “pip install opencv-python” in this env but when i try to import cv2 i still get i google a lot for this problem win11 vscode try python=3.7,3.8.3.10,3.11 Any kind of help is appreciated!
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Reddit
reddit.com › r/learnpython › no module named 'cv2'
r/learnpython on Reddit: No module named 'cv2'
November 11, 2022 -

Trying to make a face detection program. I installed opencv using the plugins setting and using pip install opencv-python. But it is still not recognizing cv2. I checked if there were any previous versions. I'm using pycharm. How do I fix this?

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Streamlit
discuss.streamlit.io › community cloud
Getting No module cv2 found - Community Cloud - Streamlit
October 30, 2022 - Hi All, I been trying to deploy an app using streamlit. but getting cv2 module not found. pls can anyone help me to sort out this issue
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JanBask Training
janbasktraining.com › community › python-python › modulenotfounderror-no-module-named-cv21
ModuleNotFoundError No Module Named Cv2 | JanBask Training Community
November 16, 2022 - The "Module Not Found" error, specifically "No Module Named Cv2," typically occurs when trying to import the OpenCV library (cv2) in Python code without it being installed in the current environment.
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Medium
ccchang77.medium.com › 解法-importerror-no-module-named-cv2-9e27972abc5a
[解法]ImportError: No module named cv2 | by Chiya.Chang | Medium
December 19, 2018 - [解法]ImportError: No module named cv2 import cv2 ModuleNotFoundError: No module named ‘cv2’ 機器學習練習生-1 …
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Jupyter Community Forum
discourse.jupyter.org › notebook
Cv2 package doesn't work - Notebook - Jupyter Community Forum
June 19, 2024 - I am trying to use the cv2 package on my jupyter notebook that is running in a unique conda environment (I named it MNIST). I have tried the following installs but they don’t work: pip install numpy opencv-python conda…
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Microsoft Learn
learn.microsoft.com › en-us › answers › questions › 127878 › modulenotfounderror-no-module-named-cv2-in-python
ModuleNotFoundError: No module named ‘cv2’ in Python - Microsoft Q&A
October 15, 2020 - More than likely, it's because the IP address doesn't represent an actual cam device. But nothing related to module load failures (see attached 33880-untitled-1.txt). I get the same error locally when using your form entries.