Python error for 4.1.0 - cv.imshow(winname, mat) not implemented

asked 2019-09-04 08:09:08 -0600

Sunilvb gravatar image

System information (version) OpenCV => 4.1.0 Operating System / Platform => Raspberry Pi 4 / Python 3.7.3 Compiler => cpp Detailed description I am trying to run a python3.7 code with OpenCV 4.1.0 on Raspberry 4 I have OpenCV compiled and installed on RPi4 and tested the version number with cv2.version command.

I get an error when I try to run the Capture Video from Camera sample from https://docs.opencv.org/4.1.0/dd/d43/...

The error message is as follows : cv2.error: OpenCV(4.1.0) /home/pi/opencv/modules/highgui/src/window.cpp:627: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Cocoa 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'

There seem to be other similar errors for functions not implemented. Is this something I could fix on my end or is it truly not implemented in 4.1.0

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in cv.getBuildInformation() what is it written in your configuration in GUI ?

I use window :

 GUI:
    Win32 UI:                    YES
    OpenGL support:              YES (opengl32 glu32

)

LBerger gravatar imageLBerger ( 2019-09-04 08:15:42 -0600 )edit

I see : GUI: GTK+: NO VTK support : NO

Do I need to rebuild to enable GUI support ? If yes, what CMAKE option do I need to use ?

Sunilvb gravatar imageSunilvb ( 2019-09-04 09:35:56 -0600 )edit

In Raspberry pi 4: sudo pip3 install libgtk2.0-dev and pkg-config -y ,Then do cmake

supra56 gravatar imagesupra56 ( 2019-09-04 21:24:45 -0600 )edit

Thank you. I had installed libgtk2.0-dev as well. Is there a script for raspberry pi 4 to install 4.1.0 that works ?

Sunilvb gravatar imageSunilvb ( 2019-09-05 08:11:12 -0600 )edit

I haven't install yet. I am waiting monitor 28" 4K arriving at my door today. I'm moving to 4.1.1. I can't post script here, because of limited to 700 characters. Email me supra56 with google.

supra56 gravatar imagesupra56 ( 2019-09-05 09:09:07 -0600 )edit

Oh ok. Would be able to put your 4.1.1 script on github.com when your done? thank you in advance.

Sunilvb gravatar imageSunilvb ( 2019-09-05 10:27:47 -0600 )edit

I'm moving to OpenCV 4.1.2.

supra56 gravatar imagesupra56 ( 2019-09-12 07:57:15 -0600 )edit
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