CODEWITHSUNDEEP
python-3.x
Rodo Anh
Rodo Anh

Reputation: 93

Can not import opencv in python3 in Raspberry Pi3?

Any solution for this error ?, need help :(

I import cv2 in python3:

import cv2

and it results like this:

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python3.5/dist-packages/cv2/__init__.py", line 4, in <module>
    from .cv2 import *
ImportError: libQtTest.so.4: cannot open shared object file: No such file or directory

Upvotes: 9

Views: 17254

Answers (6)

Kiryamwibo Yenusu
Kiryamwibo Yenusu

Reputation: 176

Here are the steps to solve your problem

  1. First uninstall opencv-python

sudo pip3 uninstall opencv-python

` 2. install opencv using the CMake

  1. Install CMAKE developer packages

sudo apt-get install build-essential cmake pkg-config -y

  1. Install Image I/O packages

sudo apt-get install libjpeg-dev libtiff5-dev libjasper-dev libpng12-dev -y

  1. Install Video I/O packages

sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev -y

sudo apt-get install libxvidcore-dev libx264-dev -y

  1. Install the GTK development library for basic GUI windows

sudo apt-get install libgtk2.0-dev libgtk-3-dev -y

  1. Install optimization packages (improved matrix operations for OpenCV)

sudo apt-get install libatlas-base-dev gfortran -y

  1. Install Python 3 and numpy

sudo apt-get install python3 python3-setuptools python3-dev -y

sudo pip3 install numpy

  1. follow this link for more details HOW TO INSTALL OPENCV 3.4.0 WITH PYTHON 3 ON RASPBERRY PI 3

Upvotes: 2

user12348536
user12348536

Reputation: 81

You can install opencv-python in raspberry with the following commands:

pip3 install opencv-python 

sudo apt-get install libatlas-base-dev 

sudo apt-get install libjasper-dev 

sudo apt-get install libqtgui4 

sudo apt-get install python3-pyqt5 

sudo apt install libqt4-test

Upvotes: 8

M. D. P
M. D. P

Reputation: 764

Try :

sudo apt-get install libQtTest-dev

thanks.

Upvotes: -1

Nelson Sequiera
Nelson Sequiera

Reputation: 1374

Use this:

sudo apt install libqt4-test

Reference:

Upvotes: 12

loopbing
loopbing

Reputation: 35

pip install opencv-python==3.3.0.10

Upvotes: -1

kishea
kishea

Reputation: 637

on on rasphberry pi, you have to build opencv from source.

The easiest is to get a USB flash of 8 GB or more, you must format it to NTFS or EXT4. The build needs about 6GB of space.

install required packages using

sudo apt-get install build-essential cmake pkg-config libjpeg-dev libtiff5-dev libjasper-dev libpng12-dev libgtk2.0-dev libgstreamer0.10-0-dbg libgstreamer0.10-0 libgstreamer0.10-dev libv4l-0 libv4l-dev libavcodec-dev libavformat-dev libswscale-dev libv4l-dev libxvidcore-dev libx264-dev libatlas-base-dev gfortran python-numpy python-scipy python-matplotlib libgtkglext1-dev v4l-utils python2.7-dev python3.5-dev python3-pip python3-numpy

follow the commands below but care fully.

cd ~
wget -O opencv.zip https://github.com/Itseez/opencv/archive/3.2.0.zip
unzip opencv.zip

if you have enough space on the PI SD card (16GB or more)

cd ~/opencv-3.2.0/

if you use the flash then

cd /media/pi/

press the tab key to autocomplete the command.

cmake -D CMAKE_BUILD_TYPE=RELEASE \
    -D CMAKE_INSTALL_PREFIX=/usr/local \
    -D INSTALL_C_EXAMPLES=OFF \
    -D INSTALL_PYTHON_EXAMPLES=OFF \
    -D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib-3.2.0/modules \
    -D BUILD_EXAMPLES=OFF \
    -D ENABLE_NEON=ON /home/pi/opencv-3.2.0

sudo make -j4 install

A successful build will take you approximately 3.5 to 4.5 hours, the pi may slow down in speed during this point but it is worth it.

Now You Can Install using

sudo make install

REMEMBER THAT if you installed opencv using pip or pip3 you must uninstall using 

pip uninstall opencv-python

or

pip3 uninstall opencv-python

Only then will opencv work for both python2 and python3 on your rasphberry pi.

Upvotes: 1

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