TensorFlow-Object-Detection-on-the-Raspberry-Pi ImportError: /usr/local/lib/python3.7/dist-packages/cv2/cv2.cpython-37m-arm-linux-gnueabihf.so: undefined symbol: __atomic_fetch_add

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Raspberry 4 python 3.7 tensorflow 2.0 i follow your guidence , and this issues happended at last , how should i do ?

Nov 20 '19 04:11 happy-little-zhang

rp3b+,same error.

Nov 21 '19 05:11 mentianyi

Same error using Raspbian Buster

Nov 21 '19 18:11 saifsmailbox98

Tried this workaround:

$ LD_PRELOAD=/usr/lib/arm-linux-gnueabihf/libatomic.so.1.2.0 python3 Object_detection_picamera.py  --usbcam

Getting a new error now:

Traceback (most recent call last):
  File "Object_detection_picamera.py", line 27, in <module>
    import tensorflow as tf
ModuleNotFoundError: No module named 'tensorflow'

Not sure if they are relevant.

Edit: Not relevant. The workaround should work.

Nov 21 '19 18:11 saifsmailbox98

No help..

Nov 22 '19 08:11 mentianyi

Getting the same error?

Nov 22 '19 17:11 saifsmailbox98

I'm seeing this as well.

Nov 22 '19 20:11 Zach-OP

Hey, this is because the latest version of openCV doesn't work with RPi. Instead of pip3 install opencv-python try pip3 install opencv-python==3.4.6.27 You will need to uninstall the latest version first. pip3 uninstall opencv-python

Nov 22 '19 20:11 Zach-OP

i used another way to solve this issue yesterday, but it's not convenient i first install opencv follow other guidence
https://www.pyimagesearch.com/2019/09/16/install-opencv-4-on-raspberry-pi-4-and-raspbian buster/ , then i skep the step of installing opencv in this guidence . the result is i need to execute some extra code everytime i run the "Object_detection_picamera.py", they are :

sudo find / -type f -name ‘atom.so*’
LD_PRELOAD=/usr/lib/arm-linux-gnueabihf/libatomic.so.1.2.0 python3 Object_detection_picamera.py

Nov 24 '19 07:11 happy-little-zhang

i tried your way today , and it did works .
thank you for taking the time to solve this issue @Zach-OP

Nov 24 '19 07:11 happy-little-zhang

thank you so much Zach-Op

Dec 02 '19 06:12 jlbs86

When i try this, i get the error ''Could not install packages due to an EnvironmentError: 404 Client Error: Not found for url: https://pypi.org/simple/opencv-pyhton/''

Do you have any idea to achieve this problem?

Dec 18 '19 09:12 ueray

NICE !!!

Dec 25 '19 17:12 Pupan-cpe

i have same error.. but is not helped. i try this solution and this. but also it doesnt work.. anybody plz help me 😭

Jan 01 '20 11:01 insung3511

it did work with previous versions of opencv.. thanks

Jan 08 '20 17:01 deysarkarswarup

Thank you so much! Worked like charm!

Jan 27 '20 05:01 andromeda1998

Thanks you so much @Zach-OP It really useful !!!

Feb 03 '20 14:02 vietanha74

2020-02-09 05:51:42.552137: E tensorflow/core/platform/hadoop/hadoop_file_system.cc:132] HadoopFileSystem load error: libhdfs.so: cannot open shared object file: No such file or directory mmal: mmal_vc_port_enable: failed to enable port vc.null_sink:in:0(OPQV): ENOSPC mmal: mmal_port_enable: failed to enable connected port (vc.null_sink:in:0(OPQV))0x2948490 (ENOSPC) mmal: mmal_connection_enable: output port couldn't be enabled Traceback (most recent call last): File "Object_detection_picamera.py", line 124, in camera = PiCamera() File "/usr/lib/python3/dist-packages/picamera/camera.py", line 433, in init self._init_preview() File "/usr/lib/python3/dist-packages/picamera/camera.py", line 513, in _init_preview self, self._camera.outputs[self.CAMERA_PREVIEW_PORT]) File "/usr/lib/python3/dist-packages/picamera/renderers.py", line 558, in init self.renderer.inputs[0].connect(source).enable() File "/usr/lib/python3/dist-packages/picamera/mmalobj.py", line 2212, in enable prefix="Failed to enable connection") File "/usr/lib/python3/dist-packages/picamera/exc.py", line 184, in mmal_check raise PiCameraMMALError(status, prefix) picamera.exc.PiCameraMMALError: Failed to enable connection: Out of resources

Feb 09 '20 11:02 Riverlox12

Thank you sooooooo much

Feb 16 '20 07:02 modarm-e

It worked for me on RPI 3 B. It uninstalled my opencv_python-4.1.1.26 now it's ok with opencv-python==3.4.6.27. Thanks a lot !

Feb 20 '20 10:02 gdoise

Use OpenCV contrib with the right version.

pip install opencv-contrib-python==4.1.0.25

Feb 27 '20 04:02 svsadafule

i excecuted the same python 3.4.6.27 was installed but againg showing the same error

Feb 27 '20 18:02 bharath-velisala

Okay thank you very much! Have a great day!

On Sun, Feb 16, 2020, 1:16 AM modarm-e [email protected] wrote:

Feb 28 '20 00:02 Riverlox12

it works well for me thanks

Mar 07 '20 06:03 Edwiinrtz

Did you solve this? I have same issue

Mar 27 '20 09:03 harshbhatt99

I tried Zac's approach to uninstall and then install OpenCV. I tried using LD_PRELOAD. I tried using VIRTUALWRAPPER_PYTHON. I tried mkvirtualenv cv2. None of them worked. I use Pi 4, 4GB and Intel Movidius NCS2, Python 3.7. Any other suggestions are much appreciated. This has taken much too much time to get resolved. Hopefully there is an easy solution. Many thanks, Martin from NZ

Apr 04 '20 03:04 Martink-NZ

thanks

Apr 14 '20 18:04 Pupan-cpe

I tried Zac's approach to uninstall and then install OpenCV. I tried using LD_PRELOAD. I tried using VIRTUALWRAPPER_PYTHON. I tried mkvirtualenv cv2. None of them worked. I use Pi 4, 4GB and Intel Movidius NCS2, Python 3.7. Any other suggestions are much appreciated. This has taken much too much time to get resolved. Hopefully there is an easy solution. Many thanks, Martin from NZ

I am also getting the same issue on rpi 4 . Someone plz help

May 03 '20 09:05 shubhamkhandhar

Did you found any solution please post it

May 03 '20 11:05 shubhamkhandhar

$ vi .bashrc (or nano .bashrc under root) add：export LD_PRELOAD=/usr/lib/arm-linux-gnueabihf/libatomic.so.1 exit with save file. $ source .bashrc $ python3 Python 3.7.3 (default, Dec 20 2019, 18:57:59) [GCC 8.3.0] on linux Type "help", "copyright", "credits" or "license" for more information.

It will work.

May 06 '20 09:05 60999

Update following @Zach-OP advice to stay away from the latest version: On a Pi4 today :

OpenCV 4.1.1.26 KO
OpenCV 4.1.0.25 imports properly and seems to run fine so far => Install with pip3 install opencv-python==4.1.0.25

May 14 '20 01:05 yoher

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ImportError: /usr/local/lib/python3.7/dist-packages/cv2/cv2.cpython-37m-arm-linux-gnueabihf.so: undefined symbol: __atomic_fetch_add_8

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ImportError: /usr/local/lib/python3.7/dist-packages/cv2/cv2.cpython-37m-arm-linux-gnueabihf.so: undefined symbol: __atomic_fetch_add_8

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