display image in opencv with python

Question

i am learning openCv with python.i want to display image but the code is not working.. it is not displaying anything rather than errors i searched but problem still same.. i followed solution mentioned here

OpenCV-Python not displaying image

  import cv2
img = cv2.imread("D:\\iki\\images.png", 0)
if img is None:
  print ("The file does not exist")
else:
  cv2.imshow("image", img)

but it didnt solve my problem..kindly point out where i am doing mistake would be grateful

error: Traceback (most recent call last): File "C:/Users/ATech/AppData/Local/Programs/Python/Python37-32/cc task/FYP_OpenCv/read_show_img.py", line 7, in <module> cv2.imshow("image", img) cv2.error: OpenCV(4.0.0) C:\projects\opencv-python\opencv\modules\highgui\src\window.cpp:625: 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'

Always check if img is None. Try to use the absolute path. — Berriel
– Berriel, Commented Apr 14, 2019 at 12:27
I wrote... if img is None. Also, I said: try to use the absolute path; did you try? — Berriel
– Berriel, Commented Apr 14, 2019 at 12:29

wcosta · Accepted Answer · 2019-04-14 12:37:10Z

1

Just make sure your file does exist. Try this:

import cv2
img = cv2.imread("./Downloads/2nd-color.png", 0)
if img is None:
  print ("The file does not exist")
else:
  cv2.imshow("image", img)

Be aware of the second argument in imread. 0 is for grayscale. Have a look at: https://docs.opencv.org/3.0-beta/doc/py_tutorials/py_gui/py_image_display/py_image_display.html#read-an-image

Hope it helps

answered Apr 14, 2019 at 12:37

wcosta

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1 Comment

wcosta Over a year ago

You are welcome. If it answers your question, please mark as answered. Otherwise, comment what is still wrong and we can try to figure that out :)

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