Opencv imshow() not showing icons #213

rickstaa · 2019-06-21T12:37:32Z

System information

OS: Ubutun 16.04
Container: Yes created with singularity 3.2.1
Pylibfreenect2 installation: Installed with pip
Python version: 3.7
Virtual environment: Conda Enviroment

Problem description

When running the pylibfreenect multiframe_listener.py example the cv2.imshow window doesn't show icons. I also raised an issue on the repository of the pylibfreenect package but as I am not sure if the problem has to do with a missing pylibfreenect or opencv dependency I also opened a topic here.

Expected

Current

Troubleshooting steps

I am currently looking at whether a system icon package is missing and whether this is a bug related to opencv.

What I already tried

Installing opencv from different channels:

pip install opencv
conda install opencv
conda install opencv-python

Installing GTK and VTK as explained in this topic.

The text was updated successfully, but these errors were encountered:

native-api · 2019-06-23T04:25:48Z

    cv2.imshow("ir", ir.asarray() / 65535.)
cv2.error: OpenCV(3.4.2) /tmp/build/80754af9/opencv-suite_1535558553474/work/modules/highgui/src/window.cpp:632: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Carbon support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function 'cvShowImage'

Looks like you are using a headless version of this package. If you tried to install it multiple times via different tools, it's also possible you have a mess of files from different packages in your Python installation so you'll need to recreate your environment from scratch.

conda install opencv

That package is not related to this project. See https://github.com/skvark/opencv-python#installation-and-usage for a complete list of what this project supplies.

Also note that this project is only tested against vanilla CPython. If the problem doesn't reproduce there, it's most probably Anaconda's problem.

rickstaa · 2019-06-25T16:49:10Z

@native-api Thanks for your response. This was indeed a problem with the opencv-contrib-pyton and opencv-python packages:

pip install opencv-python
pip install opencv-contrib-python

Like you stated above when creating a fresh conda environment and installing OpenCV directly using conda install -c conda-forge opencv both the error and the icon problem disappeared.

ttsesm · 2019-10-22T17:13:45Z

I am also having the same issue. I have recreated my environment from scratch but it doesn't seem to help. Also I am not using conda but pip, and I do not think that the opencv-python is headless. According to the documentation as the headless version is indicated the opencv-python-headless.

rickstaa · 2019-10-22T17:29:06Z

@Theodoret Thanks for your message. For me, the only solution that help was to switch to the conda package. I However opened the topic so that @native-api or any of the other maintainers can look into your question.

rickstaa · 2019-10-22T17:34:39Z

@Theodoret As the conda OpenCV package contains a number of additional python packages you can also try to install them individually to see which package you are missing. The following packages are contained in the conda opencv package:


    package                    |            build
    ---------------------------|-----------------
    bzip2-1.0.8                |       h7b6447c_0          78 KB
    ca-certificates-2019.10.16 |                0         131 KB
    mkl-service-2.3.0          |   py37he904b0f_0         218 KB
    mkl_fft-1.0.14             |   py37ha843d7b_0         155 KB
    mkl_random-1.1.0           |   py37hd6b4f25_0         321 KB
    numpy-1.17.2               |   py37haad9e8e_0           4 KB
    numpy-base-1.17.2          |   py37hde5b4d6_0         4.2 MB
    opencv-3.4.2               |   py37h6fd60c2_1          11 KB
    pip-19.3.1                 |           py37_0         1.9 MB
    py-opencv-3.4.2            |   py37hb342d67_1         1.0 MB
    python-3.7.4               |       h265db76_1        32.1 MB
    ------------------------------------------------------------
                                           Total:        40.1 MB

The following NEW packages will be INSTALLED:

  _libgcc_mutex      pkgs/main/linux-64::_libgcc_mutex-0.1-main
  blas               pkgs/main/linux-64::blas-1.0-mkl
  bzip2              pkgs/main/linux-64::bzip2-1.0.8-h7b6447c_0
  ca-certificates    pkgs/main/linux-64::ca-certificates-2019.10.16-0
  cairo              pkgs/main/linux-64::cairo-1.14.12-h8948797_3
  certifi            pkgs/main/linux-64::certifi-2019.9.11-py37_0
  ffmpeg             pkgs/main/linux-64::ffmpeg-4.0-hcdf2ecd_0
  fontconfig         pkgs/main/linux-64::fontconfig-2.13.0-h9420a91_0
  freeglut           pkgs/main/linux-64::freeglut-3.0.0-hf484d3e_5
  freetype           pkgs/main/linux-64::freetype-2.9.1-h8a8886c_1
  glib               pkgs/main/linux-64::glib-2.56.2-hd408876_0
  graphite2          pkgs/main/linux-64::graphite2-1.3.13-h23475e2_0
  harfbuzz           pkgs/main/linux-64::harfbuzz-1.8.8-hffaf4a1_0
  hdf5               pkgs/main/linux-64::hdf5-1.10.2-hba1933b_1
  icu                pkgs/main/linux-64::icu-58.2-h9c2bf20_1
  intel-openmp       pkgs/main/linux-64::intel-openmp-2019.4-243
  jasper             pkgs/main/linux-64::jasper-2.0.14-h07fcdf6_1
  jpeg               pkgs/main/linux-64::jpeg-9b-h024ee3a_2
  libedit            pkgs/main/linux-64::libedit-3.1.20181209-hc058e9b_0
  libffi             pkgs/main/linux-64::libffi-3.2.1-hd88cf55_4
  libgcc-ng          pkgs/main/linux-64::libgcc-ng-9.1.0-hdf63c60_0
  libgfortran-ng     pkgs/main/linux-64::libgfortran-ng-7.3.0-hdf63c60_0
  libglu             pkgs/main/linux-64::libglu-9.0.0-hf484d3e_1
  libopencv          pkgs/main/linux-64::libopencv-3.4.2-hb342d67_1
  libopus            pkgs/main/linux-64::libopus-1.3-h7b6447c_0
  libpng             pkgs/main/linux-64::libpng-1.6.37-hbc83047_0
  libstdcxx-ng       pkgs/main/linux-64::libstdcxx-ng-9.1.0-hdf63c60_0
  libtiff            pkgs/main/linux-64::libtiff-4.0.10-h2733197_2
  libuuid            pkgs/main/linux-64::libuuid-1.0.3-h1bed415_2
  libvpx             pkgs/main/linux-64::libvpx-1.7.0-h439df22_0
  libxcb             pkgs/main/linux-64::libxcb-1.13-h1bed415_1
  libxml2            pkgs/main/linux-64::libxml2-2.9.9-hea5a465_1
  mkl                pkgs/main/linux-64::mkl-2019.4-243
  mkl-service        pkgs/main/linux-64::mkl-service-2.3.0-py37he904b0f_0
  mkl_fft            pkgs/main/linux-64::mkl_fft-1.0.14-py37ha843d7b_0
  mkl_random         pkgs/main/linux-64::mkl_random-1.1.0-py37hd6b4f25_0
  ncurses            pkgs/main/linux-64::ncurses-6.1-he6710b0_1
  numpy              pkgs/main/linux-64::numpy-1.17.2-py37haad9e8e_0
  numpy-base         pkgs/main/linux-64::numpy-base-1.17.2-py37hde5b4d6_0
  opencv             pkgs/main/linux-64::opencv-3.4.2-py37h6fd60c2_1
  openssl            pkgs/main/linux-64::openssl-1.1.1d-h7b6447c_3
  pcre               pkgs/main/linux-64::pcre-8.43-he6710b0_0
  pip                pkgs/main/linux-64::pip-19.3.1-py37_0
  pixman             pkgs/main/linux-64::pixman-0.38.0-h7b6447c_0
  py-opencv          pkgs/main/linux-64::py-opencv-3.4.2-py37hb342d67_1
  python             pkgs/main/linux-64::python-3.7.4-h265db76_1
  readline           pkgs/main/linux-64::readline-7.0-h7b6447c_5
  setuptools         pkgs/main/linux-64::setuptools-41.4.0-py37_0
  six                pkgs/main/linux-64::six-1.12.0-py37_0
  sqlite             pkgs/main/linux-64::sqlite-3.30.0-h7b6447c_0
  tk                 pkgs/main/linux-64::tk-8.6.8-hbc83047_0
  wheel              pkgs/main/linux-64::wheel-0.33.6-py37_0
  xz                 pkgs/main/linux-64::xz-5.2.4-h14c3975_4
  zlib               pkgs/main/linux-64::zlib-1.2.11-h7b6447c_3
  zstd               pkgs/main/linux-64::zstd-1.3.7-h0b5b093_0

ttsesm · 2019-10-22T17:43:08Z

@rickstaa thanks for the pkgs list. However, it does not seem that any of the other packages has to do anything with the icons. I would argue that the issue is related with the opencv pkg itself. Most likely the conda version and this one are kind of different created, or I do not know I might actually be wrong here.

skvark · 2019-10-22T18:16:25Z

The conda package is this one https://github.com/conda-forge/opencv-feedstock which means if you run something like conda install libopencv opencv py-opencv you are not using this package.

The package provided by this repository can be installed with pip install opencv-python. Please note it's very important that you did run only that command, nothing else. If you installed OpenCV Python bindings from multiple providers then we can't be sure which package you are using.

Please post the output of cv2.getBuildInformation() so we can see exact info about the package.

skvark · 2019-10-22T18:24:11Z

Also, do not do this:

pip install opencv-python
pip install opencv-contrib-python

This will break your environment as explained in the readme. Install only one of the packages. opencv-python includes only OpenCV stable main modules. opencv-contrib-python includes both OpenCV main modules and the extra contrib modules. If you need extra modules, install only opencv-contrib-python.

ttsesm · 2019-10-22T20:51:22Z

@skvark I was aware of the need to have only one of the available modules installed as well as not having both commands run for installing the cv2 module. Thus I have only installed the opencv-contrib-python module. I have tried it in another computer and I am facing the same problem. In any case please find below the output of the command that you have asked hopefully this helps:

General configuration for OpenCV 4.1.1 =====================================
  Version control:               4.1.1

  Extra modules:
    Location (extra):            /io/opencv_contrib/modules
    Version control (extra):     4.1.1

  Platform:
    Timestamp:                   2019-09-02T15:48:01Z
    Host:                        Linux 4.15.0-1028-gcp x86_64
    CMake:                       3.9.0
    CMake generator:             Unix Makefiles
    CMake build tool:            /usr/bin/gmake
    Configuration:               Release

  CPU/HW features:
    Baseline:                    SSE SSE2 SSE3
      requested:                 SSE3
    Dispatched code generation:  SSE4_1 SSE4_2 FP16 AVX AVX2
      requested:                 SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX
      SSE4_1 (13 files):         + SSSE3 SSE4_1
      SSE4_2 (1 files):          + SSSE3 SSE4_1 POPCNT SSE4_2
      FP16 (0 files):            + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX
      AVX (4 files):             + SSSE3 SSE4_1 POPCNT SSE4_2 AVX
      AVX2 (27 files):           + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2

  C/C++:
    Built as dynamic libs?:      NO
    C++ Compiler:                /usr/lib/ccache/compilers/c++  (ver 4.8.2)
    C++ flags (Release):         -Wl,-strip-all   -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wsign-promo -Wuninitialized -Winit-self -Wno-delete-non-virtual-dtor -Wno-comment -Wno-missing-field-initializers -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG  -DNDEBUG
    C++ flags (Debug):           -Wl,-strip-all   -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wsign-promo -Wuninitialized -Winit-self -Wno-delete-non-virtual-dtor -Wno-comment -Wno-missing-field-initializers -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -g  -O0 -DDEBUG -D_DEBUG
    C Compiler:                  /usr/lib/ccache/compilers/cc
    C flags (Release):           -Wl,-strip-all   -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wuninitialized -Winit-self -Wno-comment -Wno-missing-field-initializers -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -O3 -DNDEBUG  -DNDEBUG
    C flags (Debug):             -Wl,-strip-all   -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wuninitialized -Winit-self -Wno-comment -Wno-missing-field-initializers -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -g  -O0 -DDEBUG -D_DEBUG
    Linker flags (Release):      -L/root/ffmpeg_build/lib  -Wl,--gc-sections  
    Linker flags (Debug):        -L/root/ffmpeg_build/lib  -Wl,--gc-sections  
    ccache:                      YES
    Precompiled headers:         NO
    Extra dependencies:          ade /opt/Qt4.8.7/lib/libQtGui.so /opt/Qt4.8.7/lib/libQtTest.so /opt/Qt4.8.7/lib/libQtCore.so /lib64/libz.so dl m pthread rt
    3rdparty dependencies:       ittnotify libprotobuf libjpeg-turbo libwebp libpng libtiff libjasper IlmImf quirc

  OpenCV modules:
    To be built:                 aruco bgsegm bioinspired calib3d ccalib core datasets dnn dnn_objdetect dpm face features2d flann fuzzy gapi hfs highgui img_hash imgcodecs imgproc line_descriptor ml objdetect optflow phase_unwrapping photo plot python3 quality reg rgbd saliency shape stereo stitching structured_light superres surface_matching text tracking video videoio videostab xfeatures2d ximgproc xobjdetect xphoto
    Disabled:                    world
    Disabled by dependency:      -
    Unavailable:                 cnn_3dobj cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev cvv freetype hdf java js matlab ovis python2 sfm ts viz
    Applications:                -
    Documentation:               NO
    Non-free algorithms:         NO

  GUI: 
    QT:                          YES (ver 4.8.7 EDITION = OpenSource)
      QT OpenGL support:         NO
    GTK+:                        NO
    VTK support:                 NO

  Media I/O: 
    ZLib:                        /lib64/libz.so (ver 1.2.3)
    JPEG:                        libjpeg-turbo (ver 2.0.2-62)
    WEBP:                        build (ver encoder: 0x020e)
    PNG:                         build (ver 1.6.37)
    TIFF:                        build (ver 42 - 4.0.10)
    JPEG 2000:                   build (ver 1.900.1)
    OpenEXR:                     build (ver 2.3.0)
    HDR:                         YES
    SUNRASTER:                   YES
    PXM:                         YES
    PFM:                         YES

  Video I/O:
    DC1394:                      NO
    FFMPEG:                      YES
      avcodec:                   YES (58.55.100)
      avformat:                  YES (58.31.101)
      avutil:                    YES (56.33.100)
      swscale:                   YES (5.6.100)
      avresample:                NO
    GStreamer:                   NO
    v4l/v4l2:                    YES (linux/videodev2.h)

  Parallel framework:            pthreads

  Trace:                         YES (with Intel ITT)

  Other third-party libraries:
    Lapack:                      NO
    Eigen:                       NO
    Custom HAL:                  NO
    Protobuf:                    build (3.5.1)

  OpenCL:                        YES (no extra features)
    Include path:                /io/opencv/3rdparty/include/opencl/1.2
    Link libraries:              Dynamic load

  Python 3:
    Interpreter:                 /opt/python/cp37-cp37m/bin/python (ver 3.7.4)
    Libraries:                   libpython3.7m.a (ver 3.7.4)
    numpy:                       /opt/python/cp37-cp37m/lib/python3.7/site-packages/numpy/core/include (ver 1.14.5)
    install path:                python

  Python (for build):            /opt/python/cp37-cp37m/bin/python

  Java:                          
    ant:                         NO
    JNI:                         NO
    Java wrappers:               NO
    Java tests:                  NO

  Install to:                    /io/_skbuild/linux-x86_64-3.7/cmake-install
-----------------------------------------------------------------

as I see it depends on the Qt4.8 package, is this dynamically or statically linked? Because my Qt4 installation is not in the /opt folder.

skvark · 2019-10-23T06:19:49Z

It's dynamically linked. However, opencv-python does not use your global system Qt. The packages ship with their own Qt. The manylinux wheel packages are crafted with a special auditwheel tool: https://github.com/pypa/auditwheel

If you have a look at the installation folder you should see something like this inside the .libs folder under cv2:

~/.local/lib/python3.6/site-packages/cv2:

drwxrwxr-x 5 skvark skvark     4096 Jun 17 19:32 .
drwx------ 7 skvark skvark     4096 Jul  4 09:50 ..
-rwxrwxr-x 1 skvark skvark 28481592 Jul  4 09:49 cv2.cpython-36m-x86_64-linux-gnu.so
drwxrwxr-x 3 skvark skvark     4096 Jun 17 19:32 data
-rw-rw-r-- 1 skvark skvark      233 Jul  4 09:49 __init__.py
drwxrwxr-x 2 skvark skvark     4096 Jul  4 09:50 .libs
-rw-rw-r-- 1 skvark skvark    30910 Jul  4 09:49 LICENSE-3RD-PARTY.txt
-rw-rw-r-- 1 skvark skvark     1097 Jul  4 09:49 LICENSE.txt
drwxrwxr-x 2 skvark skvark     4096 Jun 17 19:32 __pycache__

~/.local/lib/python3.6/site-packages/cv2/.libs:

libavcodec-874f3d51.so.58.47.106   libQtCore-3dbacd8a.so.4.8.7  libswresample-a49c020a.so.3.4.100  libz-a147dcb0.so.1.2.3
libavformat-fb41c63f.so.58.26.101  libQtGui-6d0f14dd.so.4.8.7   libswscale-4e6f4703.so.5.4.100
libavutil-473e9eb1.so.56.26.100    libQtTest-1183da5d.so.4.8.7  libvpx-8459aeef.so.6.0.0

I did some digging and it seems that OpenCV has its own icon set: https://github.com/opencv/opencv/tree/master/modules/highgui/src/files_Qt
https://github.com/opencv/opencv/blob/master/modules/highgui/src/window_QT.qrc

This is the most likely reason why the icons are not appearing. You could try to add the icons manually to the cv2 folder (I have no idea will that work).

Due to the license of the icons (https://github.com/opencv/opencv/tree/master/modules/highgui/src/files_Qt/Milky) I'm not sure if I can redistribute them within opencv-python.

ttsesm · 2019-10-26T13:21:57Z

@skvark it shouldn't be a problem redistributing the icons (considering that the conda package for example redistributes them). In any case if you want to be sure you could ask the guys at the opencv project.

michelecos · 2020-02-13T21:16:34Z

On a clean MacOS Catalina withous macports od homebrew I have created a virtual environment and installed numpy, opencv, and QT5

pip install numpy
pip install opencv-python
pip install pyqt5

And then ran the following program

import cv2
img = cv2.imread("m.png")
cv2.imshow("Mountains", img)
cv2.waitKey(0)
cv2.destroyAllWindows()

I had an error

qt.qpa.plugin: Could not find the Qt platform plugin "cocoa" in ""
This application failed to start because no Qt platform plugin could be initialized. Reinstalling  the application may fix this problem.

I removed opencv-python and verified that PyQt5 was working properly.
Finally, i removed opencv-python and installed opencv-python-headless instead, allong with PyQt5. This time it worked well.

Is this the expected behavior? I found the package list and the installation order in a tutorial on OpenCV with Python on MacOS. The tutorial did not mention installation conflicts.

I found that if I do not install PyQt5 and install opencv-python in isolation, I have the same error.

skvark · 2020-02-14T07:11:58Z

opencv-python ships with its own Qt5 which is why you are seeing the error. opencv-python-headless does not ship with Qt5 but it's compiled against cocoa (which cannot be turned off) which means that opencv-python-headless is able to use imshow on macOS while the Windows and Linux wheels are not able to do that (macOS isn't usually used in server environments...). The qt.qpa.plugin issue is related to latest opencv-python version and is tracked here: #290

There are no conflicts with pyqt5.

michelecos · 2020-02-14T12:33:35Z

Thank you very much. I actually do not care about Qt at this stage of my experimentation. I am trying to port and actualize something I did in C++ in 2018, which needs nothing more than imshow. This means that with opencv-python-headless I am all set and happily going forward.
Thank you for making me understand.

xieshiyao · 2020-05-12T13:57:49Z

Had the same issue and solved it by installing & removing opencv-contrib-python.

pip install --user opencv-contrib-python
pip uninstall  opencv-contrib-python

FYI, I'm on Fedora 31.

LiuPeiqiCN · 2021-01-06T08:56:48Z

@skvark I was aware of the need to have only one of the available modules installed as well as not having both commands run for installing the cv2 module. Thus I have only installed the opencv-contrib-python module. I have tried it in another computer and I am facing the same problem. In any case please find below the output of the command that you have asked hopefully this helps:

General configuration for OpenCV 4.1.1 =====================================
  Version control:               4.1.1

  Extra modules:
    Location (extra):            /io/opencv_contrib/modules
    Version control (extra):     4.1.1

  Platform:
    Timestamp:                   2019-09-02T15:48:01Z
    Host:                        Linux 4.15.0-1028-gcp x86_64
    CMake:                       3.9.0
    CMake generator:             Unix Makefiles
    CMake build tool:            /usr/bin/gmake
    Configuration:               Release

  CPU/HW features:
    Baseline:                    SSE SSE2 SSE3
      requested:                 SSE3
    Dispatched code generation:  SSE4_1 SSE4_2 FP16 AVX AVX2
      requested:                 SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX
      SSE4_1 (13 files):         + SSSE3 SSE4_1
      SSE4_2 (1 files):          + SSSE3 SSE4_1 POPCNT SSE4_2
      FP16 (0 files):            + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX
      AVX (4 files):             + SSSE3 SSE4_1 POPCNT SSE4_2 AVX
      AVX2 (27 files):           + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2

  C/C++:
    Built as dynamic libs?:      NO
    C++ Compiler:                /usr/lib/ccache/compilers/c++  (ver 4.8.2)
    C++ flags (Release):         -Wl,-strip-all   -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wsign-promo -Wuninitialized -Winit-self -Wno-delete-non-virtual-dtor -Wno-comment -Wno-missing-field-initializers -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG  -DNDEBUG
    C++ flags (Debug):           -Wl,-strip-all   -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wsign-promo -Wuninitialized -Winit-self -Wno-delete-non-virtual-dtor -Wno-comment -Wno-missing-field-initializers -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -g  -O0 -DDEBUG -D_DEBUG
    C Compiler:                  /usr/lib/ccache/compilers/cc
    C flags (Release):           -Wl,-strip-all   -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wuninitialized -Winit-self -Wno-comment -Wno-missing-field-initializers -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -O3 -DNDEBUG  -DNDEBUG
    C flags (Debug):             -Wl,-strip-all   -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wuninitialized -Winit-self -Wno-comment -Wno-missing-field-initializers -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections  -msse -msse2 -msse3 -fvisibility=hidden -g  -O0 -DDEBUG -D_DEBUG
    Linker flags (Release):      -L/root/ffmpeg_build/lib  -Wl,--gc-sections  
    Linker flags (Debug):        -L/root/ffmpeg_build/lib  -Wl,--gc-sections  
    ccache:                      YES
    Precompiled headers:         NO
    Extra dependencies:          ade /opt/Qt4.8.7/lib/libQtGui.so /opt/Qt4.8.7/lib/libQtTest.so /opt/Qt4.8.7/lib/libQtCore.so /lib64/libz.so dl m pthread rt
    3rdparty dependencies:       ittnotify libprotobuf libjpeg-turbo libwebp libpng libtiff libjasper IlmImf quirc

  OpenCV modules:
    To be built:                 aruco bgsegm bioinspired calib3d ccalib core datasets dnn dnn_objdetect dpm face features2d flann fuzzy gapi hfs highgui img_hash imgcodecs imgproc line_descriptor ml objdetect optflow phase_unwrapping photo plot python3 quality reg rgbd saliency shape stereo stitching structured_light superres surface_matching text tracking video videoio videostab xfeatures2d ximgproc xobjdetect xphoto
    Disabled:                    world
    Disabled by dependency:      -
    Unavailable:                 cnn_3dobj cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev cvv freetype hdf java js matlab ovis python2 sfm ts viz
    Applications:                -
    Documentation:               NO
    Non-free algorithms:         NO

  GUI: 
    QT:                          YES (ver 4.8.7 EDITION = OpenSource)
      QT OpenGL support:         NO
    GTK+:                        NO
    VTK support:                 NO

  Media I/O: 
    ZLib:                        /lib64/libz.so (ver 1.2.3)
    JPEG:                        libjpeg-turbo (ver 2.0.2-62)
    WEBP:                        build (ver encoder: 0x020e)
    PNG:                         build (ver 1.6.37)
    TIFF:                        build (ver 42 - 4.0.10)
    JPEG 2000:                   build (ver 1.900.1)
    OpenEXR:                     build (ver 2.3.0)
    HDR:                         YES
    SUNRASTER:                   YES
    PXM:                         YES
    PFM:                         YES

  Video I/O:
    DC1394:                      NO
    FFMPEG:                      YES
      avcodec:                   YES (58.55.100)
      avformat:                  YES (58.31.101)
      avutil:                    YES (56.33.100)
      swscale:                   YES (5.6.100)
      avresample:                NO
    GStreamer:                   NO
    v4l/v4l2:                    YES (linux/videodev2.h)

  Parallel framework:            pthreads

  Trace:                         YES (with Intel ITT)

  Other third-party libraries:
    Lapack:                      NO
    Eigen:                       NO
    Custom HAL:                  NO
    Protobuf:                    build (3.5.1)

  OpenCL:                        YES (no extra features)
    Include path:                /io/opencv/3rdparty/include/opencl/1.2
    Link libraries:              Dynamic load

  Python 3:
    Interpreter:                 /opt/python/cp37-cp37m/bin/python (ver 3.7.4)
    Libraries:                   libpython3.7m.a (ver 3.7.4)
    numpy:                       /opt/python/cp37-cp37m/lib/python3.7/site-packages/numpy/core/include (ver 1.14.5)
    install path:                python

  Python (for build):            /opt/python/cp37-cp37m/bin/python

  Java:                          
    ant:                         NO
    JNI:                         NO
    Java wrappers:               NO
    Java tests:                  NO

  Install to:                    /io/_skbuild/linux-x86_64-3.7/cmake-install
-----------------------------------------------------------------

as I see it depends on the Qt4.8 package, is this dynamically or statically linked? Because my Qt4 installation is not in the /opt folder.

I also built opencv to static library (Windows+VS2019) and I have same problem.

jcbritobr · 2022-01-03T00:38:37Z

Why this bug is closed, if it is still happenning?

rickstaa · 2022-01-05T08:31:53Z

@jcbritobr This issue was closed since it is not a problem with the opencv-python package but is the result of how a user sets up the python environment and installs the required packages. The comments above, especially #213 (comment) explain how to solve the icons missing problem.

skvark · 2022-01-05T08:36:17Z

This is not a bug. Shipping the icons along the packages would be a license violation and cannot be done. OpenCV team is looking for an alternative icon set that does not have such a restrictive license. Please follow the issue here: #585

jcbritobr · 2022-01-05T09:36:50Z

@jcbritobr This issue was closed since it is not a problem with the opencv-python package but is the result of how a user sets up the python environment and installs the required packages. The comments above, especially #213 (comment) explain how to solve the icons missing problem.

I did a fresh installation that way

julio@jcbritobr:~/Workspace/python$ mkdir test_issue
julio@jcbritobr:~/Workspace/python$ cd test_issue/
julio@jcbritobr:~/Workspace/python/test_issue$ python3 -m venv test_issue
julio@jcbritobr:~/Workspace/python/test_issue$ . test_issue/bin/activate
(test_issue) julio@jcbritobr:~/Workspace/python/test_issue$ pip install opencv-python
Collecting opencv-python
  Using cached opencv_python-4.5.5.62-cp36-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (60.4 MB)
Collecting numpy>=1.17.3; python_version >= "3.8"
  Using cached numpy-1.22.0-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (16.8 MB)
Installing collected packages: numpy, opencv-python
Successfully installed numpy-1.22.0 opencv-python-4.5.5.62
(test_issue) julio@jcbritobr:~/Workspace/python/test_issue$ code .

Its happening yet even only installing that way you show in #213

jcbritobr · 2022-01-05T09:40:22Z

This is not a bug. Shipping the icons along the packages would be a license violation and cannot be done. OpenCV team is looking for an alternative icon set that does not have such a restrictive license. Please follow the issue here: #585

Understood. Thank you. I think change the iconset for a mit or bsd license should solve this issue.

yunus-temurlenk · 2023-10-14T17:06:29Z

I met the similar issue and answered here. Basically it is all related to Qt and its enablity with Opencv

naourass · 2023-10-18T23:47:18Z

Any workaround to show the icons while waiting for a fix?

rickstaa closed this as completed Jun 25, 2019

rickstaa reopened this Oct 22, 2019

rickstaa closed this as completed Jan 6, 2021

donkawechico mentioned this issue Jul 20, 2021

Toolbar, x/y coordinates, rgb color picker not showing in 4.5.x #516

Closed

4 tasks

skvark mentioned this issue Nov 22, 2021

No icons in imshow() #585

Closed

4 tasks

alalek mentioned this issue Feb 13, 2022

python: imshow buttons are empty opencv/opencv#21603

Closed

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Opencv imshow() not showing icons #213

Opencv imshow() not showing icons #213

rickstaa commented Jun 21, 2019

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Opencv imshow() not showing icons #213

Opencv imshow() not showing icons #213

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rickstaa commented Jun 21, 2019

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