If I move my mouse cursor over the window, it shows the spinning beach-ball of death. 2016-04-10 18:05:07 -0500, After cv.imgshow() add cv2.waitKey(0) call and a desired screen will appear, Asked: Is NYC taxi cab number 86Z5 reserved for filming? Ready to optimize your JavaScript with Rust? I am trying to visualize the image using matplotib function (plt.imshow()). The issue appears to be with the use of WINDOW_AUTOSIZE in namedWindow. Note using resizeWindow if WINDOW_AUTOSIZE still specified does not work (though I don't know if this is expected behaviour). 1980s short story - disease of self absorption, Connecting three parallel LED strips to the same power supply. In simple language it is a library used for Image Processing. Do you just want to look at the image? Sign in Let be laconistic. Examples of frauds discovered because someone tried to mimic a random sequence. Making statements based on opinion; back them up with references or personal experience. Just to make clear: despite the odd grammar in the title of this issue, and some problems with the info given about it, it is a perfectly legitimate OpenCV issue to raise. This fixes the window autosize bug on MacOS Sierra, BUT it does mean windows don't autosize at all, and instead render at 1:1 pixel scale. More questions on [categories-list], The solution for accessing multiple elements from the list can be found here. How does legislative oversight work in Switzerland when there is technically no "opposition" in parliament? In this entire tutorial, I am using two main python modules. Reverting to this will have no effect. @SSB95, not tested on Big Sur. Can a prospective pilot be negated their certification because of too big/small hands? I'm trying to feed the cuda detection output to OpenCV and having no luck! solution: keyboard_arrow_up. showing image in vscode Windows user If you are windows user, then follow the below steps: Open command prompt Run following command: $ python -m pip install -upgrade pip Install opencv using following command: ydsk ydsk a year ago. Since we are seeing runtime errors, I thought this "ldd" check might be informative: otool -L /Users/me/OpenCV/lib/python3.5/site-packages/cv2.cpython-35m-darwin.so. The following code will assist you in solving the problem.Thank you for using DeclareCode; We hope you were able to resolve the issue. The following code will assist you in solving the problem.Thank you for using DeclareCode; We hope you were able to resolve the issue. OpenCV 3.2 + Python 3.6.1: imshow() not worked even with waitKey(0). Thanks for contributing an answer to Stack Overflow! How to say "patience" in latin in the modern sense of "virtue of waiting or being able to wait"? It is mainly used to do all the operation related to images. Ready to optimize your JavaScript with Rust? Parameter 1. Had the same issue and no solutions I've found worked for me. In the CMake GUI, select the build directory and the source directory. worked on Mac, but not on Pi Print the numer of faces trained and end program. 0. The fly in the ointment is that the window icon is still in the dock. 2014-11-08 15:32:55 -0500, OpenCV match template without mask? With the change on cv2.waitKey() to waiting for a Q press, the problem goes away. What's strange is that if I simply "import matplotlib.pyplot", everything starts working. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Yeah, unfortunately though, that didn't work either. Not the answer you're looking for? cv2.imshow is still not working on kaggle and nobody seems to know how to fix it. displaying cv2.imshow on specific window position Add Answer Technical Problem Cluster First Answered On August 31, 2020 Popularity 5/10 Helpfulness 4/10 To read and display images using OpenCV Python, you could use cv2.imread() for reading the image to a variable and cv2.imshow() to display the image in a separate window. You could display each frame via method such as cv2_imshow, but you will have a long list of images. I'm having an issue with cv2.imshow () on a Mac from python. I have downloaded the latest python version through home-brew. We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. However the window does not come to the foreground, and is not focusable (and the icon continues to bounce). By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. By clicking Sign up for GitHub, you agree to our terms of service and It has to be empty when you start configuring it. The window is shut down, the program can continue. commit 5d03262 is not before #8307. :-(. Already on GitHub? Needs patching in. Window_name: This parameter represents the name of window in which the image needs to be displayed. cv2 waikey () waits for the pressed key event before going to the next set of operations. Same problem, attacked in multiple ways, all failed. I have spent countless hours trying to fix problems with OpenCV, especially when running cv2.imshow like this: imshow has just the bad reputation of not working a lot of times. No error is produced, this is exactly what happens: Fixed it by using conda environment instead of pip, and using the following commands in conda: "pip install opencv-python", then "pip install opencv-python-headless". Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Since I couldn't find any solution online, I decided I will write this post, either for the George of the future or for anyone else that might face the same problem! If I use WINDOW_NORMAL and manually size using resizeWindow then I can see the content again. By default, the flag is cv2.WINDOW_AUTOSIZE. More questions on [categories-list], Get Solution rotate existing labels pythonContinue, The solution for get all combinations from two lists python can be found here. Note also that cv2 works fine, as far as my testing shows, as long as no cv2 display commands are invoked. And for any negative value of 'delay' or when 'delay' = 0, the function waits infinitely for a key event. This suggests something isn't being initialized by opencv. jonata paulino 7 months ago. How does the Chameleon's Arcane/Divine focus interact with magic item crafting? Does a 120cc engine burn 120cc of fuel a minute? import numpy as np import cv2 Step 2: Examples on cv2.imshow () method Who is listening on a given TCP port on Mac OS X? showing image in vscode" cv2.imshow not working; cv2.imshow doesn't work; cv2.imshow python not working; cv.imshow() not showing python visual studio code; cv2.imshow not workiung; cv2.imshow not working in vscode; cv2.imshow not. When I run the command, a window opens in the background, and a python rocket icon appears on my dock, bouncing. This simple code is running fine with no errors; however, no image is produced and nothing is displayed, and I'm forced to manually stop the code and interrupt it to exit, otherwise it just seems to run forever? Something can be done or not a fit? However the window does not come to the foreground, and is not focusable (and the icon continues to bounce). Asking for help, clarification, or responding to other answers. My fix matches the one you mention, so all good. You could perform a show and clear, but you will have some performance issues as the UI doesn't display the output fast enough (will have many skipped frames) . Have a question about this project? I'm having an issue with cv2.imshow() on a Mac from python. Yes, it has been a common issue that large images lead to large windows. And the other is the OpenCV (cv2) module. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. I'm working on the one project, which use opencv-python. Tried reverting further to #7193 but began to have build problems so stopped. privacy statement. More questions on [categories-list], Get Solution Python __floordiv__ magic methodContinue, The solution for rotate existing labels python can be found here. cv2.imshow() is not working properly in PyCharm (MacOS). Several of us are finding runtime window display errors with various versions of cv2 running on recent incarnations of MacOS. One is NumPy for black and white image creation. See images (1) no error, stuck at "RingBuffer - allocated 4 buffers (14745600 bytes each . You'll need to revert window_cocoa.mm to commit acb6269 to undo #8307. waitKey(0) means wait till the user press a key. I am a new pycharm professional user. It will be helpful when image is too large in dimension and adding track bar to windows. However, I've completely uninstalled and reinstalled everything, and still have the problem. For example cv2.imread() works, and display of the resulting image through matplotlib also. @RobertGolosynsky: If you follow @mattmyne 's advice of doing git checkout acb626 -- modules/highgui/src/window_cocoa.mm and rebuild the problem will be fixed for you. again, thanks a lot for sharing your insights here, - everything's alright, dont worry ;). In that case, you can specify whether window is resizable or not. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. Debian/Ubuntu - Is there a man page listing all the version codenames/numbers? window_name: A string representing a window's name in which the image is to be displayed. What is this fallacy: Perfection is impossible, therefore imperfection should be overlooked. The following code will assist you in solving the problem. OpenCV gui doesn't play well with jupyter/iPython. Queries related to "cv2.imshow not. Makes for some gigantic windows when imshow'ing large images. Refresh the page, check. truble is non-working but very important function cv2.imshow(). You may also want to check out all available functions/classes of the module cv2, or try the search function . We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. The following is the test environment setup. More questions on [categories-list], Get Solution accessing multiple elements from the listContinue, The solution for Python __floordiv__ magic method can be found here. The following are 30 code examples of cv2.imshow(). As a native speaker why is this usage of I've so awkward? Thanks for the tip. By default, the flag is cv2.WINDOW_AUTOSIZE. answered Did neanderthals need vitamin C from the diet? @cstarknyc all good with you, you did anything perfectly as requested. I have the latest version of python (2.7.15) on Mac OS X 10.14.3. When hacked to confusion [i,int (j)] the demo works and pretty window is generated. You will get this error when cv2 module is not properly installed on your machine. The following code will assist you in solving the problem.Thank you for using DeclareCode; We hope you were able to resolve the issue. Get the Code! . Instead you can do: import matplotlib.pyplot as plt plt.imshow(an_image) You signed in with another tab or window. The following code will assist you in solving the problem.Thank you for using DeclareCode; We hope you were able to resolve the issue. I have not tested it in python but hope it will have resolved this too. Can't get simple histogram generation to work. Is it correct to say "The glue on the back of the sticker is dying down so I can not stick the sticker to the wall"? Using: Python3, CSI RPi camera, Jetson Nano Detection works fine, and I can save the Numpy image to disk, but cannot get it to render or display via cv2, and I don't get any errors, and the process doesn't complete. Note to @alalek: I reran the tests you suggested: @cstarknyc , the problem in digits.py was fixed a month ago. BTW, Usage questions should go to Users OpenCV Q/A forum: http://answers.opencv.org, I am having the same issue with the same macOS version and opencv version, but with Python 2.7.12, the same issue with the same macOS ,and install opencv follow pyimage. But, unfortunately, the image is not being displayed. Why can't we just save the contents to a file and run it using the command python filename.py. I want to be able to quit Finder but can't edit Finder's Info.plist after disabling SIP, Cooking roast potatoes with a slow cooked roast. Let's import them. The code: With Ubuntu 18.04 and Anaconda environment I was getting the error with Pycharm as, process finished with exit code 139 (interrupted by The solution for cv2.imshow not working in vscode can be found here. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Not quite sure how to proceed, so any pointers would be very welcome. It is done with the function cv2.namedWindow (). Why 'cv2.imshow()' function is not displaying my image properly? To learn more, see our tips on writing great answers. Not the answer you're looking for? confirming the bug with empty window when doing cv2.imshow, can't contribute, too noob, totaly recreated what @cstarknyc claimed : "I get the window title bar but an empty window". How do I tell if this single climbing rope is still safe for use? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. I am unable to resolve this issue even after setting "DISPALY=TRUE" in run configuration settings. Thanks for the update! This is occurring with both opencv 2.4.9 and 3.0.0alpha, and occurs with either the QT backend or the normal Mac backend, so it's obviously a problem with my installation. tested against several images e.g., img = cv2.imread ('tmp.png',0); cv2.imshow ('test',img);cv2.waitKey (0) digits.py has a bug on line 107 in py3, since the zip returns an int x and a float y, leading confusion [i,j] to fail. Unfortunately, the same thing happens. More questions on [categories-list], Get Solution get all combinations from two lists pythonContinue, The solution for python change file location can be found here. It's still the same nonetheless and it works!! Because cv2.imshow outputs a window and it's not possible with a browser tab. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. It is done with the function cv2.namedWindow(). Appealing a verdict due to the lawyers being incompetent and or failing to follow instructions? Aha! is not working in on the command line for Visual Studio Code on OS X/Mac, cv2.imshow() does not work inside a custom function, Disconnect vertical tab connector from PCB. At what point in the prequels is it revealed that Palpatine is Darth Sidious? Compilations give no indication whatsoever of a problem. I'm not sure what you want to do with startWindowThread, but if you want to install opencv the easiest way, open the image, and view it try this: install conda (A better package manager for opencv than homebrew), activate it and install opencv from menpo's channel. Amartya Bhattacharya, o nico problema que quando vou instalar, ele pede pra pressionar [y/n] e no tem como fazer isso. Making statements based on opinion; back them up with references or personal experience. Connect and share knowledge within a single location that is structured and easy to search. Did C++ examples show normal windows? https://stackoverflow.com/q/44469973/7813604, macOS cocoa window autosize could not access image dimensions, remove ARC and auto synthesize assumptions in cocoa_window.mm, Operating System / Platform => MacOS Sierra 10.12.5, trial#3 installed using: conda install -c menpo opencv3 in virtual env for py35, digits.py has a bug on line 107 in py3, since the. downgrade to the previous release which uses manylinux1 (4.2.0 and 3.4.9) use some proper GUI framework to display the images such as PyQt5. How to use OpenCV imshow () in a Jupyter Notebook Quick Tip | by Mr Data Insight | Medium Sign In Get started 500 Apologies, but something went wrong on our end. rev2022.12.9.43105. CV2 is nothing but the latest version of opencv. Well occasionally send you account related emails. The device index is just an integer to define a Camera. This is working for me. P.S. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. 2. image: This parameter represents the image that we want to be displayed. Syntax: cv2.imshow (window_name, image) Parameters: window_name: A string representing the name of the window in which image to be displayed. Would it be possible, given current technology, ten years, and an infinite amount of money, to construct a 7,000 foot (2200 meter) aircraft carrier? Show the output video (this will not work for large video file) . Thanks for contributing an answer to Stack Overflow! The following code will assist you in solving the problem. It got a lot . Find centralized, trusted content and collaborate around the technologies you use most. Find centralized, trusted content and collaborate around the technologies you use most. a question; I checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found any solution; I updated to the latest OpenCV version and the . It is working on Catalina. I haven't debugged. cv2.imshow('frame',img) ~ I've tryed to use other way to show image but it isn't work with non-downloaded image and i can't download picture due to restrition of my project. Obtain closed paths using Tikz random decoration on circles. From openCV you can do can whatever you want to do from images. cv2.imshow (window_name, image) This is the general syntax for our function. and abruptly exits. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Did the apostolic or early church fathers acknowledge Papal infallibility? This exact same code used to work fine on my windows laptop. alalek on Jul 17, 2020. cv2.imshow opens multiple windows with "opencv-python" package from Pypi opencv/opencv#17827. cv2.imshow () method is used to display an image in a window. Its syntax is as follows - Syntax cv2.waitKey (delay) It waits for 'delay' milliseconds for any positive value of 'delay'. Why is it so much harder to run on a treadmill when not holding the handlebars? I want to be able to quit Finder but can't edit Finder's Info.plist after disabling SIP, What is this fallacy: Perfection is impossible, therefore imperfection should be overlooked. The solution for numpy move columns can be found here. There is a special case where you can already create a window and load image to it later. did anything serious ever run on the speccy? import cv2 cv2.namedWindow ('displaymywindows', cv2.WINDOW_NORMAL) From the documentation: There is a special case where you can already create a window and load image to it later. To learn more, see our tips on writing great answers. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. And yes, you will likely need waitKey , just don't call it with 0 or it will wait indefinitely. @berak: I was "just following orders" with executing the digits.py test. A window flashes black on the screen and disappears immediately. Resolution for No module named 'cv2' Let's see how we can solve this error. truble is non-working but very important function cv2.imshow(). Asking for help, clarification, or responding to other answers. @cstarknyc I'm not sure how your autosize used to work before, but I believe it has always resized the window to match the size of the image/matrix passed to it. First, try whether you can create a window or not. Needless to say, I feel this is quite a significant bug! Connect and share knowledge within a single location that is structured and easy to search. You can always use the resize function on the image/matrix before passing it to the window. The following code will assist you in solving the problem.Thank you for using DeclareCode; We hope you were able to resolve the issue. Successfully merging a pull request may close this issue. I'm working on the one project, which use opencv-python. The rubber protection cover does not pass through the hole in the rim. Call it with a 1 to wait just 1 millisecond and ensure the image redraws. import cv2 img=cv2.imread('C:/Python27/03323_HD.jpg') cv2.imshow('Window',img) cv2.waitKey(0) Thank you for using DeclareCode; We hope you were able to resolve the issue. Testing digits.py begets the following error: Testing a sample cpp fails also. In every case, once cv2.imshow() in invoked, I get the window title bar but an empty window, /Users/me/OpenCV/lib/python3.5/site-packages/cv2.cpython-35m-darwin.so, Having same issue also, has anyone been able to solve it. Upgrade Node.js to the latest version on Mac OS, "code ." If the config log says Python 2 is used, then delete the build directory and make a new one. When I run the command, a window opens in the background, and a python rocket icon appears on my dock, bouncing. What happens if you score more than 99 points in volleyball? When the image appears, the only button that I can press is minimise (the one in the middle and when I press any key then the spinning wheel shows up and the only thing I can do is force quit. In that case, you can specify whether window is resizable or not. the updated sample is in the master branch, (not in the 3.2 release). VideoCapture has the device index or the name of a video file. Is there a verb meaning depthify (getting more depth)? You can call imshow repeatedly without destroying it. The following code will assist you in solving the problem.Thank you for using DeclareCode; We hope you were able to resolve the issue. Cos it's not in the main git clone. Reverting to 3.2.0-265-g5d03262b0 aka
aka #8307, Python problem same; C++ sample problem same. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content, when drawing by openCV, cursor freezes over the output picture. Could you try C++ sample (add CMake option -DBUILD_EXAMPLES=ON). How can I start PostgreSQL server on Mac OS X? CGAC2022 Day 10: Help Santa sort presents! Appropriate translation of "puer territus pedes nudos aspicit"? If we pass 0, it is for the first or primary camera, 1 for the second camera, etc. In the next section we will look at the various parameters associated with it. After updating Xcode everything worked for me. I can confirm all my previously working C++ code now only shows window title bars without contents. to your account, For readability I posted this question to stackoverflow: https://stackoverflow.com/q/44469973/7813604. It doesn't show the image in a new window, but inline in the Jupyter notebook. I've tryed to use other way to show image but it isn't work with non-downloaded image and i can't download picture due to restrition of my project. rev2022.12.9.43105. cv2.error: OpenCV(4.5.4) . OpenCV-Python is a library of Python bindings designed to solve computer vision problems. In this blog post, we are going to build and install OpenCV on anM1 Mac.Last year in November 2020 apple releases their first ARM64-based M1 chip. Why don't you use a local IDE like pyCharm? Why does my stock Samsung Galaxy phone/tablet lack some features compared to other Samsung Galaxy models? Lets see if there is any error. MOSFET is getting very hot at high frequency PWM. I do not believe this is a bug as a result of this issue. I used git checkout acb626 -- modules/highgui/src/window_cocoa.mm. The above PR fixes the issue for me. I have reproduced the jupyter kernel crash problem. Except that the fix you indicate apparently isn't in master yet? With the change on cv2.waitKey () to waiting for a Q press, the problem goes away. More questions on [categories-list], Get Solution python change file locationContinue, accessing multiple elements from the list, get all combinations from two lists python, c# script for download music from telegram channel, what is dii what is dii what is dii what is dii what is dii what is dii, pandas replace null with 0 check if dataframe contains infinity pandas dataframe replace inf, how to make a time limit using renpy how to make a time limit using renpy, roobet crash bot roobet crash bot roobet crash bot roobet crash bot, gpt2 simple continue training from checkpoint, # Plot the histogram of sex attribute using Matplotlib # Use bins = 2 and rwidth = 0.85 # Plot the histogram of sex attribute using Matplotlib # Use bins = 2 and rwidth = 0.85, Checking Availability of user inputted File name, python char to hex get hex code of character python get hex code of character python python char to hex, empaquetado y manejo dependencias en python empaquetado y manejo dependencias en python empaquetado y manejo dependencias en python empaquetado y manejo dependencias en python empaquetado y manejo dependencias en python empaquetado y manejo dependencias en python empaquetado y manejo dependencias en python empaquetado y manejo dependencias en python, how to count categories in a csv command line, cv2 load image load img cv2 opencv2 python show, como fazer um bot spamm no discord com python, queryset o que queryset o que queryset o que queryset o que queryset o que queryset o que queryset o que queryset o que queryset o que , file = Root() path = file.fileDialog() print(PATH = , path), print [url_string for extension in extensionsToCheck if(extension in url_string)], sphinx, where to write the glossary of a sofware project, selenium text returns empty string python selenium text value is empty in flask returns, online python to c converter convert python code to c online convert python code to c online convert python code to c online convert python code to c online convert python code to c online, bad resolution in the exported RDKit images, python replace list of ips from yaml file with new list, Randome Word generator from consonant, vowel and specific string Randome Word generator from consonant, vowel and specific string Randome Word generator from consonant, vowel and specific string Randome Word generator from consonant, vowel and specific string, Print a line using python, All the word lengths should be fixed i.e., every word should have the width of the longest word, auto play vido is not working in iphon auto play vido is not working in iphon, how to correct spelling in pandas datafeame how to correct spelling in pandas datafeame how to correct spelling in pandas datafeame. Japanese Temple Geometry Problem: Radii of inner circles inside quarter arcs, Penrose diagram of hypothetical astrophysical white hole, Effect of coal and natural gas burning on particulate matter pollution. Enter these entries (the thing between : and = is the type of variable that CMake GUI asks for when you enter the variable. Connecting three parallel LED strips to the same power supply. Opencv is a library of programming functions mainly aimed at real-time computer vision. the kernel crashes. The python rocket pops up with nothing showing, and the code acts as if it was running forever (looping), and I'm forced to interrupt it, No, just running it directly from PyCharm script. drawing.cpp again compiles no prob, but runtime generates a flash of a window (black?) I was able to resolve it only by copying this function from google colab tools. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content, cv2.imshow command doesn't work properly in opencv-python, Pycharm/Python OpenCV and CV2 install error, OpenCV not working properly with python on Linux with anaconda. Then, we capture the video frame by frame. Creating Local Server From Public Address Professional Gaming Can Build Career CSS Properties You Should Know The Psychology Price How Design for Printing Key Expect Future. 46 comments jagannath-sahoo commented on Sep 26, 2016 edited by mshabunin alalek added the incomplete label bug category: python bindings labels alalek added question (invalid tracker) and removed bug labels ntirupathirao18 commented on Feb 14, 2018 The text was updated successfully, but these errors were encountered: Could you try to run this sample: digits (shows "table" with numbers). @cstarknyc doing git checkout acb626 -- modules/highgui/src/window_cocoa.mm and rebuilding fixed the problem for me, thank you very much! Let be laconistic. build OpenCV wheel locally and use it, instructions are in the readme: https://github . CGAC2022 Day 10: Help Santa sort presents! there are some differences between the opencv3 and opencv2.4 bindings, - with the 3.1 ones, the drawing calls like cv2.circle, cv2.rectangle or cv2.polylines return a new image , but the 2.4 versions do not so, in your case, cv2.polylines returns None, and you're trying to imshow () an invalid/empty image. Via Python and C++ examples. Getting error that cv2.imshow() is not implemented, openCV: cannot detect small shapes using findContours, OpenCV cv2.imshow is not working because of the qt, cv2.namedWindow and imshow is not working properly. VideoWriter failure: "Gstreamer Opencv backend does not support this codec actually", cv2.imshow() not functioning properly on Mac, Creative Commons Attribution Share Alike 3.0. Steps to Implement cv2.imshow () in python Step 1: Import all necessary libraries. Share Is there any reason on passenger airliners not to have a physical lock between throttles? The window automatically fits the image size. Am a total noob at OpenCV so haven't been following updates. Could you please run my Updated version of my code? But if you specify flag to be cv2.WINDOW_NORMAL, you can resize window. Syntax cv2.imshow(window_name, image) Parameters. What is about C++ samples? To capture a video in Python, use the cv2.VideoCapture () and create an object of VideoCapture. Perhaps WINDOW_AUTOSIZE is being treated as WINDOW_NORMAL, or there is an issue with the autosize code (or that code is not being called). Here is the code: import cv2 img = cv2.imread ('sample.jpg') cv2.startWindowThread () cv2.imshow ('img', img) # wait forever, if Q is pressed then close cv image window if cv2.waitKey (0) & 0xFF == ord ('q'): cv2.destroyAllWindows () Hope this help. Are defenders behind an arrow slit attackable? signal 11 sigsegv), Solved it by pip install opencv-python-headless in addition to pip install opencv-python. Running macOS 10.12.5. print("\n [INFO] {0} faces trained. How could my characters be tricked into thinking they are on Mars? [closed]. When I am running this piece of code on ipython (MacOS /python 2.7.13). Any clue? @PauloMarques is it working for you on macOS Big Sur? cv2.imshow not working in vscode The solution for "cv2.imshow not working in vscode" can be found here. Windows don't seem to die gracefully either, but that may simply be SOP for cv2 in Python. 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