cv2.imshow "The function is not implemented. Rebuild the library" about opencv-python

[nofreewill42]

1. sudo apt install libgtk2.0-dev pkg-config as the prompt says for Ubuntu users -> [Same Error]
2. pip uninstall opencv-python-headless -> [Other Error]
3. pip uninstall opencv-python; pip install opencv-python -> [Solved]

Thank you, @hg2051

[hg2051]

It's because of ''opencv-python-headless'. Uninstall it!

[TracyLoza]

I have the same problem too. I did pip uninstall opencv-python-headless and it still does not work.

Same to me, but I do this:
pip uninstall opencv-python
Then:
pip install opencv-python

[Yuvaldavid]

I have the same problem too. I did pip uninstall opencv-python-headless and it still does not work.

[Kitty1122]

Tried pip uninstall opencv-python-headless - didn't work
Also, pip uninstall opencv-python; pip install open-python - didn't work

Closed Spyder environment and opened it again - worked! :)

[Mayur8991]

ya it is because of pip install OpenCV- python- headless just uninstall it and your error will be sorted

[obensustam2]

Please use Pycharm, it is way easier to manage the packages

[bkaan99]

Solve: Unistall opencv-python-headless

[bkaan99]

@LikhithChakravarthi Hi Addinational Solution :
Use Pycharm,
Install opencv-python and cv2 from the module installation location of the interpreter you will use from the interpreter options in Pycharm.

[venkat1230]

Hay
please try to update the --> { python -m pip install opencv-python --upgrade } <-- in windows
it worked for me.

[Sellouk]

The error you're encountering indicates that the version of OpenCV you're using was built without GUI support for window management. To resolve this issue and display the camera feed in a window, you can either rebuild OpenCV with GUI support or use an alternative library to display the camera feed. Here are two possible solutions:

Solution 1: Rebuild OpenCV with GUI Support (Recommended)

Ensure you have CMake installed on your system.

Rebuild OpenCV with GUI support using CMake. You can do this by following these steps:

Download the OpenCV source code from the official OpenCV website: https://opencv.org/releases/

Extract the downloaded source code archive to a directory.

Open a terminal or command prompt and navigate to the directory where you extracted the OpenCV source code.

Create a build directory within the OpenCV source directory and navigate to it:
Configure the build using CMake with GUI support enabled:
using :
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_opencv_python2=OFF -D BUILD_opencv_python3=ON -D WITH_TBB=ON -D WITH_V4L=ON -D WITH_QT=ON -D WITH_OPENGL=ON ..

After successful configuration, build and install OpenCV:
make
sudo make install

Once the installation is complete, you should have OpenCV with GUI support.

Update your Python environment to use the newly built OpenCV library. You may need to uninstall the previous OpenCV package and install the new one.

[skvark]

Duplicate of #17

[hprasad98]

getting same error
please help..
in-advance thank you

[dwaynemcfarlane]

uninstalled opencv-python-headless and still the same error. I am using Ubuntu.

[LikhithChakravarthi]

I have tried everything, unistalling opencv-python, contrib modules and reinstalling them and Uninstalling headless module, but not working. Can ayone help me?

[Lelouch2503]

Hay please try to update the --> { python -m pip install opencv-python --upgrade } <-- in windows it worked for me.

Thanks, it worked for me too=)))

[vivekmorariya]

if you are using spyder then ...
uninstall the open cv which you have installed by command prompt or anaconda prompt
then install the opencv library using the terminal available in the spyder itself
then try again to run the same code/program using spyder it will run.

[VanshRana12]

The error you're encountering indicates that the version of OpenCV you're using was built without GUI support for window management. To resolve this issue and display the camera feed in a window, you can either rebuild OpenCV with GUI support or use an alternative library to display the camera feed. Here are two possible solutions:

Solution 1: Rebuild OpenCV with GUI Support (Recommended)

Ensure you have CMake installed on your system.

Rebuild OpenCV with GUI support using CMake. You can do this by following these steps:

Download the OpenCV source code from the official OpenCV website: https://opencv.org/releases/

Extract the downloaded source code archive to a directory.

Open a terminal or command prompt and navigate to the directory where you extracted the OpenCV source code.

Create a build directory within the OpenCV source directory and navigate to it: Configure the build using CMake with GUI support enabled: using : cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_opencv_python2=OFF -D BUILD_opencv_python3=ON -D WITH_TBB=ON -D WITH_V4L=ON -D WITH_QT=ON -D WITH_OPENGL=ON ..

After successful configuration, build and install OpenCV: make sudo make install

Once the installation is complete, you should have OpenCV with GUI support.

Update your Python environment to use the newly built OpenCV library. You may need to uninstall the previous OpenCV package and install the new one.

To do this but for windows:
After running this command successfully:
"cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_opencv_python2=OFF -D BUILD_opencv_python3=ON -D WITH_TBB=ON -D WITH_V4L=ON -D WITH_QT=ON -D WITH_OPENGL=ON .."

Instead of executing "make" and "sudo make install" as these are bash commands,
In powershell you have to execute these commands in the build directory:
To Build: cmake --build . --config Release
To Install: cmake --build . --target INSTALL

Now uninstall and then reinstall "opencv-python" using pip.

Done!

[tegarpf90]

pip uninstall opencv-python; pip install opencv-python Solved by pycharm

[hzx829]

On Ubuntu, this work for me:

sudo apt-get install python3-opencv

[oussamaJMAA]

Hay please try to update the --> { python -m pip install opencv-python --upgrade } <-- in windows it worked for me.

ugprading to a newer version solved the issue for me ( opencv 4.9.0)

[DAVID-Hown]

@skvark
@hzx829
@nofreewill42
@hzx829

# apt install libgtk2.0-dev pkg-config
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
 libgl1-mesa-glx : Depends: libgl1 but it is not going to be installed
                   Depends: libglx-mesa0 but it is not going to be installed
 libgtk2.0-dev : Depends: libgtk2.0-0 (= 2.24.32-4ubuntu4) but it is not going to be installed
                 Depends: gir1.2-gtk-2.0 (= 2.24.32-4ubuntu4) but it is not going to be installed
                 Depends: libgtk2.0-common but it is not going to be installed
                 Depends: libglib2.0-dev (>= 2.27.3) but it is not going to be installed
                 Depends: libgdk-pixbuf2.0-dev (>= 2.21.0) but it is not going to be installed
                 Depends: libpango1.0-dev (>= 1.20) but it is not going to be installed
                 Depends: libatk1.0-dev (>= 1.29.2) but it is not going to be installed
                 Depends: libcairo2-dev (>= 1.6.4-6.1) but it is not going to be installed
                 Depends: libx11-dev (>= 2:1.0.0-6) but it is not going to be installed
                 Depends: libxext-dev (>= 1:1.0.1-2) but it is not going to be installed
                 Depends: libxinerama-dev (>= 1:1.0.1-4.1) but it is not going to be installed
                 Depends: libxi-dev (>= 1:1.0.1-4) but it is not going to be installed
                 Depends: libxrandr-dev (>= 2:1.2.99) but it is not going to be installed
                 Depends: libxcursor-dev but it is not going to be installed
                 Depends: libxfixes-dev (>= 1:3.0.0-3) but it is not going to be installed
                 Depends: libxcomposite-dev (>= 1:0.2.0-3) but it is not going to be installed
                 Depends: libxdamage-dev (>= 1:1.0.1-3) but it is not going to be installed
                 Depends: libxml2-utils but it is not going to be installed
                 Recommends: debhelper but it is not going to be installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).

qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/usr/local/lib/python3.8/dist-packages/cv2/qt/plugins" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: xcb.

import cv2
image = cv2.imread("1.jpg")
cv2.imshow("image", image)
cv2.waitKey(0)
cv2.destroyAllWindows()

When I connect to the server remotely using pycharm, I want a local visualization
I have encountered this problem, I would like to ask you how to solve it？

https://stackoverflow.com/questions/64784315/qt-qpa-xcb-could-not-connect-to-displayerror-while-using-opencv-on-ec2-ubuntu-s： In my past experience, pycharm can do local visualization, but sometimes it will go wrong, is this related to the pycharm version or is it related to the remote server

[jmhasan1]

It's because of ''opencv-python-headless'. Uninstall it!

Hie , I have uninstall opencv-headless but upon uninstalling that I am unable to import opencv
ModuleNotFoundError: No module named 'cv2'
(upon uninstalling opencv-headless)
And if I reinstall opencv (with opencv-headless) , it is imported but stuck in same error

[c2727c]

Did uninstall then re-install opencv-python and it worked for me.

before:

• opencv-python==4.8.0.74
• opencv-python-headless==4.9.0.80
  after:
  - opencv-python==4.9.0.80
  - opencv-python-headless==4.9.0.80

So I guess this error can be caused by mismatched versions of opencv-python and opencv-python-headless.

[dineth88]

If you are using Pycharm, just simply change the interpreter and try to run your application again. It solves my problem relating with this error.

[haileyesus34]

Uninstalling the opencv-python and then reinstalling it worked for me