OpenCV with imshow

[qenops]

In attempting to view images in openCV I run into this issue:

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 /home/jhelmus/conda/conda-bld/opencv_1512148862464/work/modules/highgui/src/window.cpp, line 605
Traceback (most recent call last):
  File "stereoCam.py", line 18, in <module>
    cv2.imshow('Camera', image)
cv2.error: /home/jhelmus/conda/conda-bld/opencv_1512148862464/work/modules/highgui/src/window.cpp:605: 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

So it looks like openCV wasn't compiled with UI support. Is this something that you could provide?

For completeness this is the code snippet that generates the error:

from picamera.array import PiRGBArray
from picamera import PiCamera
import time
import cv2

camera = PiCamera()
camera.resolution = (640, 480)
camera.framerate = 30
rawCapture = PiRGBArray(camera, size=camera.resolution)

# pause while the camera inits
time.sleep(0.1)

for frame in camera.capture_continuous(rawCapture, format='bgr', use_video_port=True):
    image = frame.array
    # display using opencv
    cv2.imshow('Camera', image)
    key = cv2.waitKey(1) & 0xFF
    # clear the stream for the next frame
    rawCapture.truncate(0)
    if key == ord('q'):
        break

[vamshireddyp]

can you first try checking
$ python

import cv2

[jjhelmus]

Building a version of OpenCV with a GUI backend is difficult. See #21