OpenCV window not working on mac

Question

So here is my code:

import cv2
img = cv2.imread('new.bmp')
cv2.imshow('FRAME', img)
cv2.waitKey(0)
cv2.destroyAllWindows()

From what I have gathered on the internet, this is supposed to display the image 'new.bmp' in a window called'FRAME'. But all that happens is this!. Can anyone help me?

does it load the image? the code seems to be ok, but it could be that it could not find the image or load it correctly... — api55, May 28 '17 at 14:59
@api55 It doesn't show any errors. How can I confirm if the image is loaded? I even tried loading the image though PIL then dumping its numpy array. I am quite familiar with PIL and can confirm the image was loaded. — rjpj1998, May 28 '17 at 15:46
Try grabbing a random JPG, GIF, or PNG from somewhere on the Web, and loading that instead to rule out any Microsoft madness in BMP files. — Mark Setchell, May 28 '17 at 16:14
Which python are you using and how did you install it? Which OpenCV are you using and how did you install it? — Mark Setchell, May 28 '17 at 16:38
@MarkSetchell I have python 3.6.0, homebrewed. Opencv 3.2, I installed it with the help of a tutorial from pyimagesearch.com. However I didn't install it in a virtual environment — rjpj1998, May 28 '17 at 16:45
I am no expert on Python (or OpenCV) but when I installed `Python3` via `homebrew`, I noticed that gave me a new binary called `/usr/local/bin/pip3` and it seems that if I use that (rather than plain `pip`) the packages I install are available in the `Python3` which I `homebrewed` whereas I believe anything I install with plain `pip` becomes associated with the Apple-supplied Python 2.x. — Mark Setchell, May 28 '17 at 17:05
If you want to confirm if the image has been loaded, just check the dimensions of img by doing `height, width, channels = img.shape ` — , May 29 '17 at 08:59
@SembeiNorimaki I can confirm the image has loaded. I am reinstalling opencv on a shitty internet connection, will report tommorow probably. — rjpj1998, May 29 '17 at 10:21

score 2 · Accepted Answer · answered Jun 01 '17 at 14:22

2

It was a silly installation problem.

I wholeheartedly apologize.

answered Jun 01 '17 at 14:22

rjpj1998

297
1
6
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Hi Sir, i'm facing the exact problem followed the same guide, it might also be a stupid mistake i made, i wonder where did your installation went wrong?, Sincerely [And here is a link to my question https://stackoverflow.com/questions/44603844/opencv-python-cv2-imshow-only-showing-top-bar-on-mac?noredirect=1#comment76219974_44603844] – libra Jun 21 '17 at 02:40

score 0 · Answer 2 · answered Nov 04 '21 at 00:22

0

If anyone is facing this issue - please install pycharm and run your code there it will automatically open the webcam for you! hope this helps

answered Nov 04 '21 at 00:22

Larry DaBig Meech

136
5

OpenCV window not working on mac

2 Answers2