cv2.error: OpenCV(4.5.0-dev) /home/pi/opencv/modules/highgui/src/window.cpp:651: error: (-2:Unspecified error) [closed]

asked 2020-11-16 12:03:50 -0500

Zapero gravatar image

updated 2020-11-16 12:19:57 -0500

Hallo, I have fallowed the steps provided in this tutorial https://www.tomshardware.com/how-to/r... and have tried scouring to get a fix for my issue bellow. I have the latest version of everything I can find to try and install and have re ran the Cmake twice now and I continue to run into this cv2.error can anyone help me figure out why I am unable to run the face recognition?(note I can import cv2 in python3 on the terminal and check things like version of CV but it doesn't want to work with python)

Traceback (most recent call last): File "headshots_picam.py", line 18, in <module> cv2.imshow("Press Space to take a photo", image) cv2.error: OpenCV(4.5.0-dev) /home/pi/opencv/modules/highgui/src/window.cpp:651: 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'

(also let me know if there are changes I need to make to the quire not sure how the openCV does all their questions)

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Closed for the following reason the question is answered, right answer was accepted by supra56
close date 2020-11-18 21:02:50.945102

Comments

sudo apt install libgtk2.0-dev and pkg-config

supra56 gravatar imagesupra56 ( 2020-11-16 12:18:20 -0500 )edit

Which rpi model?

supra56 gravatar imagesupra56 ( 2020-11-16 21:29:03 -0500 )edit

your cv2 was built without any gui support. install libgtk2.0-dev, rerun cmake, and show us the output

berak gravatar imageberak ( 2020-11-17 05:30:27 -0500 )edit

@Zapero.There is one thing in line 18... meaning that u're forgot to sudo make install after u done with make -j4. So u don't needed this install libgtk2.0-dev and pkg-config. This happened to me I left out sudo make install. This worked for me.

supra56 gravatar imagesupra56 ( 2020-11-17 07:54:10 -0500 )edit
1

@berak i have done a clean install installed the libgtk2.0dev before running cmake, ran cmake

cv2.imshow("Press Space to take a photo", image) cv2.error: OpenCV(4.5.0-dev) /home/pi/opencv/modules/highgui/src/window.cpp:651: 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'

this is the error message again

@supra56 i have run sudo make install both times (it is in the steps) and nothing im running a pi 4 model , 4 or 8 gb

Zapero gravatar imageZapero ( 2020-11-17 19:48:42 -0500 )edit

Didn't u deleted inside build folder and then do cmake again? Otherwise here is another link install opencv 4 After that, u can do face recognition. I used both rpi 3B/3B+, rpi 4B with 4/8gb

supra56 gravatar imagesupra56 ( 2020-11-17 20:46:35 -0500 )edit

Forgotten. Did u do update and upgrade before u install OpenCV 4?

supra56 gravatar imagesupra56 ( 2020-11-18 03:15:03 -0500 )edit
1

@supra56 i think i did. Let me try running that and then rerun cmake? do you think that that might fix it?

Zapero gravatar imageZapero ( 2020-11-18 12:15:32 -0500 )edit

Go ahead and try it. Don't forget to do update and upgrade before installing OpenCV 4.5.0. If u already gone into rerun cmake ...DON'T do it. //clean sd card.

supra56 gravatar imagesupra56 ( 2020-11-18 20:50:53 -0500 )edit
1

@supra56 Ok i followed the path and link you put up and everything works i have no idea what was wrong but hey its working so thanks

Zapero gravatar imageZapero ( 2020-11-18 20:55:29 -0500 )edit