debian 8 (jessie) opencv 3.2 python3.4

asked 2017-05-30 11:11:10 -0600

Hi please note: that i have managed to get this same code to run with python2.7 and 3.6 (anaconda), but for some reason it does not run with python3.4:

import cv2 
img = cv2.imread('./images/old.wood.jpg',1)
cv2.imshow('Input image', img)
cv2.waitKey(0)
cv2.destroyAllWindows()

This is the error I get:

OpenCV Error: 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 cvShowImage, file /io/opencv/modules/highgui/src/window.cpp, line 583
Traceback (most recent call last):
File "first.program.py", line 4, in <module>
cv2.imshow('Input image', img)
cv2.error: /io/opencv/modules/highgui/src/window.cpp:583: error: (-2) 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

i do have libgtk2.0-dev installed:

sudo aptitude search libgtk2.0-dev and pkg-config:
i   libgtk2.0-dev                 - development files for the GTK+ library
p   libgtk2.0-dev:i386            - development files for the GTK+ library
i   pkg-config                    - manage compile and link flags for libr
p   pkg-config:i386               - manage compile and link flags for libr

How would i run cmake to include

answered 2017-05-30 11:23:18 -0600

berak
32993 ●7 ●81 ●312

updated 2017-05-30 11:25:11 -0600

you installed 3rd party (opencv does not distribute any python/linux binaries) made binaries via a ppm, and received a "headless" (as in "no gui supplied") version.

installing libgtk won't help, you will have to build the actual cv2.so locally, with libgtk installed.

see here for build instructions

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berak thank you for your reply. I went to the build instructions followed all the way through. the problem persists. I am no expert so I am not sure what I am doing wrong. It still works with python2.7 and python3.6.

cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local ..

that is what I typed for cmake. make -j4 went fine. sudo make install too, but when I run the program it doesn't work.

Please any help is very much appreciated. Take into account that I am new to this.

this is the error I get:

OpenCV Error: 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 cvShowImage, file /io/opencv/modules/highgui/src/window.cpp, line 583
Traceback (most ...

(more)

crazygene ( 2017-05-30 12:40:53 -0600 )edit

try a cv2.__version__ to see,if you're actually using the self-build cv2.so.

berak ( 2017-05-30 17:16:29 -0600 )edit

import cv2 print(cv2.__version__)

3.2.0 that is the version it is using, which is the version I compiled. Though checking python 3.6 is using 3.1. Is there a way to switch to 3.1 on python 3.4 so that I can see if that solves the problem? I am not sure how or where I would set this?

crazygene ( 2017-06-01 23:53:55 -0600 )edit

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