Has anyone tried to install opencv for python3?. As stated here http://opencv.willowgarage.com/wiki/InstallGuide its support status is unknown. So I want to try it:
I have downloaded the sources for OpenCV-2.3.1. But cmake reports.
-- Python interpreter: /Library/Frameworks/Python.framework/Versions/3.2/bin/python3 -B (ver
3.2)
-- Python numpy: NO (Python wrappers will not be generated)
I do have numpy (version 1.6.0) installed in python3 but cmake does not find it. I am using Mac OSX 10.6 Any ideas?
Update
I just saw one more thing of the cmake output that might be helpful
-- Found PythonInterp: /Library/Frameworks/Python.framework/Versions/3.2/bin/python3 (found
version "3.2")
-- Found PythonLibs: /usr/lib/libpython2.6.dylib File "", line 1
from distutils.sysconfig import *; print get_python_lib()
^
SyntaxError: invalid syntax File "", line 1
import os; os.environ['DISTUTILS_USE_SDK']='1'; import numpy.distutils; print
numpy.distutils.misc_util.get_numpy_include_dirs()[0]
^
SyntaxError: invalid syntax File "", line 1
import sphinx; print sphinx.__version__
^ SyntaxError: invalid syntax
Notice that it found 3.2 but then libpython2.6 ??
Any ideas?
At the moment OpenCV supports Python 2.x only. OpenCV (including OpenCV 2.4) does not compiles with Python 3.x.
Python3 support is already in wishlist for future versions of OpenCV. But currently there are no activities in this direction and you are welcome to create and contribute a patch resolving the compatibility issues.
Use the pip application.
On ubuntu:
sudo apt install python3-pip
and so, on command line:
pip3 install --upgrade pip
pip3 install opencv-python
I got the thing to at least build and install. It can load the cv2 module just fine. Haven't tested too much though.
Details:
https://stackoverflow.com/a/21212023/3075814
Related
I'd like to utilize my Movidius Neural Compute Stick 1 (NCS1) to learn deep learning.
However, when I run a sample code, the following import error occurs:
python3 emotion.py -i sample.jpg -o result.jpg
Traceback (most recent call last):
File "emotion.py", line 1, in <module>
import cv2
File "/opt/intel/openvino/python/python3/cv2/__init__.py", line 129, in <module>
bootstrap()
File "/opt/intel/openvino/python/python3/cv2/__init__.py", line 112, in bootstrap
import cv2
ImportError: /opt/intel/openvino/opencv/lib/libopencv_dnn.so.4.5:
undefined symbol: _ZN15InferenceEngine5TBlobIhSt9enable_ifILb1EvEED1Ev
I'm using a Raspberry Pi 3B.
The OS is Raspberry Pi OS 32-bit (Legacy) Buster because Bullseye doesn't support NCS1.
OpenVINO Version is l_openvino_toolkit_runtime_raspbian_p_2020.3.194.tgz,
which is the last version that supports NCS1.
Here's how to reproduce.
I installed Raspberry Pi OS 32-bit (Legacy) Buster onto the microSD.
After some simple initial settings, I typed these commands to install the OpenVINO toolkit:
sudo mkdir -p /opt/intel/openvino
mkdir ~/download
cd ~/download
wget https://storage.openvinotoolkit.org/repositories/openvino/packages/2020.3/l_openvino_toolkit_runtime_raspbian_p_2020.3.194.tgz
sudo tar -xf l_openvino_toolkit_runtime_raspbian_p_2020.3.194.tgz --strip 1 -C /opt/intel/openvino
echo "source /opt/intel/openvino/bin/setupvars.sh" >> ~/.bashrc
source /opt/intel/openvino/bin/setupvars.sh
sudo usermod -a -G users "$(whoami)"
sh /opt/intel/openvino/install_dependencies/install_NCS_udev_rules.sh
In order to set up the OpenCV environment, I typed:
sudo apt update
sudo apt install -y python3-pip
sudo apt install -y libopencv-dev
sudo apt install -y python3-numpy
pip3 install pillow
That's it.
Then, I downloaded necessary images and codes, and ran emotion.py.
The whole contents of emotion.py doesn't matter here because only the first line gives me the error.
more -10 emotion.py
import cv2
import numpy as np
from PIL import ImageFont, ImageDraw, Image
import argparse
import sys
from openvino.inference_engine import IECore
frame_png = cv2.imread("frame_main.png", cv2.IMREAD_UNCHANGED)
face_png = cv2.imread("frame_face.png", cv2.IMREAD_UNCHANGED)
gender_png = cv2.imread("frame_gender.png", cv2.IMREAD_UNCHANGED)
Addtional Info:
pi#raspberrypi:~ $ python -VV
Python 2.7.16
pi#raspberrypi:~ $ python3 -VV
Python 3.7.3 (default, Oct 31 2022, 14:04:00)
[GCC 8.3.0]
Also, I tried to use berry-conda to do a similar thing with this answer.
But, it failed because the package libprotobuf is missing:
(After berry-conda installation)
pi#raspberrypi:/tmp $ which python
/home/pi/berryconda3/bin/python
pi#raspberrypi:/tmp $ which conda
/home/pi/berryconda3/bin/conda
pi#raspberrypi:/tmp $ python --version
Python 3.6.1
pi#raspberrypi:/tmp $ conda install -c defaults libprotobuf protobuf
Fetching package metadata .....
PackageNotFoundError: Package missing in current linux-armv7l channels:
- libprotobuf
This berry-conda installation completely changed my previous environment above.
I don't know if I should keep using berry-conda
or re-install Raspberry Pi OS 32-bit (Legacy) Buster again to do it from scratch.
Any suggestions would be greatly appreciated.
The error message is indicating that there is an issue with an undefined symbol in the libopencv_dnn.so.4.5 library, which suggests that there may be a compatibility issue between OpenVINO and the version of OpenCV installed on your system.
You could try reinstalling OpenVINO and making sure that it is properly configured with your system's version of OpenCV. You could also try updating or reinstalling OpenCV.
Running on M1 Mac, macOS Monterey 12.4, Python 3.10.3
pip install tables
Collecting tables
Using cached tables-3.7.0.tar.gz (8.2 MB)
Installing build dependencies ... done
Getting requirements to build wheel ... error
error: subprocess-exited-with-error
× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> [12 lines of output]
/var/folders/6g/9c7g_2tx2sb7lp8ttwtfky640000gn/T/H5closew_79lujq.c:2:5: error: implicit declaration of function 'H5close' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
H5close();
^
1 error generated.
cpuinfo failed, assuming no CPU features: No module named 'cpuinfo'
* Using Python 3.10.3 (v3.10.3:a342a49189, Mar 16 2022, 09:34:18) [Clang 13.0.0 (clang-1300.0.29.30)]
* Found cython 0.29.30
* USE_PKGCONFIG: False
.. ERROR:: Could not find a local HDF5 installation.
You may need to explicitly state where your local HDF5 headers and
library can be found by setting the ``HDF5_DIR`` environment
variable or by using the ``--hdf5`` command-line option.
[end of output]
note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error
× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.
note: This error originates from a subprocess, and is likely not a problem with pip.
I tried the following from this GitHub Issue:
pip install cython
brew install hdf5
brew install c-blosc
export HDF5_DIR=/usr/local/
export BLOSC_DIR=/usr/local/
pip install tables
But still getting the same error. Not sure if it's due to Homebrew using a different path on M1 Macs?
The issue is that Homebrew puts the files in opt/homebrew/opt/
This fixed it for me:
export HDF5_DIR=/opt/homebrew/opt/hdf5
export BLOSC_DIR=/opt/homebrew/opt/c-blosc
Again in completion to remove confusion. Running the following in terminal on Mac M1 should work.
pip install cython
brew install hdf5
brew install c-blosc
export HDF5_DIR=/opt/homebrew/opt/hdf5
export BLOSC_DIR=/opt/homebrew/opt/c-blosc
pip install tables
A solution from here solved the issue for me:
https://github.com/freqtrade/freqtrade/issues/4162
Scroll down and see "solution" provided by camxus
I am facing problem while getting opencv to work with python 3.7 in Conda on Ubuntu 20.04.
I get the following error when I try to import cv2 in python:
$ python
Python 3.7.8 | packaged by conda-forge | (default, Jul 23 2020, 03:54:19)
[GCC 7.5.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: /home/swagat/anaconda3/envs/tf2py37/lib/python3.7/site-packages/../../././libgnutls.so.30: undefined symbol: mpn_add_1, version HOGWEED_4
my Conda configuration looks something like this:
active environment : tf2py37
active env location : /home/swagat/anaconda3/envs/tf2py37
shell level : 2
user config file : /home/swagat/.condarc
populated config files :
conda version : 4.8.5
conda-build version : 3.18.9
python version : 3.7.4.final.0
virtual packages : __cuda=10.1
__glibc=2.31
I installed opencv from the conda-forge channel using the following command:
$ conda install -c conda-forge opencv
I can see that opencv is installed on my system:
$ conda list opencv
# packages in environment at /home/swagat/anaconda3/envs/tf2py37:
#
# Name Version Build Channel
libopencv 4.5.0 py37_2 conda-forge
opencv 4.5.0 py37_2 conda-forge
py-opencv 4.5.0 py37hc6149b9_2 conda-forge
I also checked if gnutls is installed:
$ conda list gnutls
# packages in environment at /home/swagat/anaconda3/envs/tf2py37:
#
# Name Version Build Channel
gnutls 3.6.13 h79a8f9a_0 conda-forge
What else I can try to solve this problem? I am kind of stuck here. Any help will be appreciated. Thanks.
It seems that conda version of the opencv is broken.
My solution is:
remove your conda opencv and install the native one:
conda remove opencv
python -m pip install opencv-python # Execute this with your conda env activated
I'm working on a cloud-based robotic application with AWS RoboMaker. I'm using ROS Kinetic, with the build tool colcon.
My robot application depends on a custom python module, which has to be in my workspace. This python module is built by colcon as a python package, not a ROS package. This page explains how to do that with catkin, but this example shows how to adapt it to colcon. So finally my workspace looks like that :
my_workspace/
|--src/
|--my_module/
| |--setup.py
| |--package.xml
| |--subfolders and python scripts...
|--some_ros_pkg1/
|--some_ros_pkg2/
|...
However the command : colcon build <my_workspace> builds all ROS packages but fails to build my python module as a package.
Here's the error I get :
Starting >>> my-module
[54.297s] WARNING:colcon.colcon_ros.task.ament_python.build:Package 'my-module' doesn't explicitly install a marker in the package index (colcon-ros currently does it implicitly but that fallback will be removed in the future)
[54.298s] WARNING:colcon.colcon_ros.task.ament_python.build:Package 'my-module' doesn't explicitly install the 'package.xml' file (colcon-ros currently does it implicitly but that fallback will be removed in the future)
--- stderr: my-module
usage: setup.py [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
or: setup.py --help [cmd1 cmd2 ...]
or: setup.py --help-commands
or: setup.py cmd --help
error: invalid command 'egg_info'
---
Failed <<< my-module [0.56s, exited with code 1]
I found this issue that seems correlated, and thus tried : pip install --upgrade setuptools
...Which fails with the error message :
Collecting setuptools
Using cached https://files.pythonhosted.org/packages/7c/1b/9b68465658cda69f33c31c4dbd511ac5648835680ea8de87ce05c81f95bf/setuptools-50.3.0.zip
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "setuptools/__init__.py", line 16, in <module>
import setuptools.version
File "setuptools/version.py", line 1, in <module>
import pkg_resources
File "pkg_resources/__init__.py", line 1365
raise SyntaxError(e) from e
^
SyntaxError: invalid syntax
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-uwFamt/setuptools/
And with pip3 install --upgrade setuptools, I get :
Defaulting to user installation because normal site-packages is not writeable
Requirement already up-to-date: setuptools in /home/ubuntu/.local/lib/python3.5/site-packages (50.3.0)
I have both Python 3.5.2 an Python 2.7, but I don't know which one is used by colcon.
So I don't know what to try next, and what the real problem is. Any help welcome !
I managed to correctly install my package and its dependencies. I develop the method below, in case it may help someone someday !
I have been mainly inspired by this old DeepRacer repository.
The workspace tree in the question is wrong. It should look like this:
my_workspace/
|--src/
|--my_wrapper_package/
| |--setup.py
| |--my_package/
| |--__init__.py
| |--subfolders and python scripts...
|--some_ros_pkg1/
|--some_ros_pkg2/
my_wrapper_package may contain more than one python custom package.
A good setup.py example is this one.
You shouldn't put a package.xml next to setup.py : colcon will only look at the dependencies declared in package.xml, and won't collect pip packages.
It may help sometimes to delete the folders my_wrapper_package generated by colcon in install/ and build/. Doing so you force colcon to rebuild and bundle from scratch.
This question already has answers here:
anaconda - graphviz - can't import after installation
(14 answers)
Closed 3 years ago.
I cannot get graphviz to install and import properly, either using conda install or pip install. I am using jupyter on anaconda.
conda install -c anaconda graphviz
---------------------------------------------------------------------------
ModuleNotFoundError Traceback (most recent call last)
<ipython-input-2-0e78fd6401bd> in <module>()
----> 1 import graphviz
2 dot_data = tree.export_graphviz(clf, out_file=None)
3 graph = graphviz.Source(dot_data)
4 graph.render("iris")
ModuleNotFoundError: No module named 'graphviz'
When I install using pip I can successfully import but when I run the below code, I get a very long error message that ends with the following when running graph.render:
from sklearn.datasets import load_iris
from sklearn import tree
import graphviz
iris = load_iris()
clf = tree.DecisionTreeClassifier()
clf = clf.fit(iris.data, iris.target)
dot_data = tree.export_graphviz(clf, out_file=None)
graph = graphviz.Source(dot_data)
graph.render("iris")
Below is the end of the end of a long error message:
ExecutableNotFound: failed to execute ['dot', '-Tpdf', '-O', 'iris'], make sure the Graphviz executables are on your systems' PATH
I have the directory where the graphviz folders are in PATH.
Anyone have an idea what I am doing wrong?
http://www.graphviz.org/Download_windows.php
Install windows package from: http://www.graphviz.org/Download_windows.php
Install python graphviz package
Add C:\Program Files (x86)\Graphviz2.38\bin to User path
Add C:\Program Files (x86)\Graphviz2.38\bin\dot.exe to System Path
RESTART COMPUTER
Worked for me!
If you're running Linux, you may have to run this command in addition to the Conda command (I had to do this):
sudo apt-get install graphviz
I was getting the exact same error in Pycharm and this solved it.