cv2.imshow () function is opening a window that always says not responding - python opencv. You missed one more line: cv2.waitKey (0) Then the window shows the image until you press any key on keyboard. Or you can pass as following: cv2.waitKey (1000) cv2.destroyAllWindows () Here, window shows image for 1000 ms, or 1 second.
All the UI things should stay on the main thread! Thats the problem causing that problem. You can not use UI stuff on an another thread like waitKey(), ...
Example #1. OpenCV program in python to demonstrate imshow () function to read an image using imread () function and then display the same image using imshow () function by creating a window and specifying the name for the window and display it as the output on the screen: #importing the module cv2. import cv2.
Mar 18, 2020 · All the UI things should stay on the main thread! Thats the problem causing that problem. You can not use UI stuff on an another thread like waitKey (), imshow () etc. Also you are trying to stop a timer from another thread, this is also an another problem. Here are the topics mentioning same issue:
Sep 26, 2016 · It opens the camera, records the video, closes the window successfully upon pressing 'q', and saves the video in .avi format. import cv2 import numpy as np # Create a VideoCapture object cap = cv2.
OpenCV imshow () – Display or Show Image You can display an image to the user during the execution of your Python OpenCV application. To display an image using opencv cv2 library, you can use cv2.imshow () function. The syntax of imshow () function is given below. cv2.imshow(window_name, image)
30.01.2020 · I'm new to opencv and starting by reading in an image, and trying to display. from the command prompt: cd to the project directory, then: import cv2 # Load a color image in grayscale img = cv2.imread('oyster.jpg',0) cv2.imshow('img', image) cv2.waitKey(0) it opens a windows10 window which is just grey and freezes. Any pointers would be appreciated.
Jun 05, 2015 · I convert the image from Pylon format to Mat using the answers on this link. Commenting the imshow and printing image data and pixel values work but keeping the imshow hangs the code at camera.RetrieveResult which is responsible for retrieving data from camera buffer to SDK's Pylon image buffer which is then converted to Mat. Things I tried:
04.05.2016 · However sometimes the window freezes and doesn't update at all, but the algorithm is still running and updated the picture a multiple times in the meantime. The window turns dark gray on this Ubuntu machine. Here is an excerpt of the involved code: for i in range (0,1000): img = loadNextImg () procImg = processImg (img) cv2.imshow ("The result ...
11.12.2013 · Jul 19, 2012 at 4:24. 1. Try a bigger delay: waitKey (20); It may be that your computer cannot process the imshow () request in the 2 milliseconds. – Sam. Jul 19, 2012 at 4:52. @vasile: This doesn't seem to make a difference. – NOP. Jul 19, 2012 at 4:56. @go4sri: The code is quite large and fairly intricate.
16.02.2014 · If you are running inside a Python console, do this: img = cv2.imread ("yourimage.jpg") cv2.imshow ("img", img); cv2.waitKey (0); cv2.destroyAllWindows () Then if you press Enter on the image, it will successfully close the image and you can proceed running other commands. Share.
Example #1. OpenCV program in python to demonstrate imshow () function to read an image using imread () function and then display the same image using imshow () function by creating a window and specifying the name for the window and display it as the output on the screen: #importing the module cv2. import cv2.
My suggestion is to use Matplotlib pyplot for displaying the image. I do it the following way. import matplotlib.pyplot as plt # load image using cv2....and ...
cv2.imshow () function is opening a window that always says not responding - python opencv. You missed one more line: cv2.waitKey (0) Then the window shows the image until you press any key on keyboard. Or you can pass as following: cv2.waitKey (1000) cv2.destroyAllWindows () Here, window shows image for 1000 ms, or 1 second.
08.03.2014 · To open and jpg file and display it using the opencv library for python. ... I've installed opencv-contrib-python library instead of opencv-python and now cv2.imshow() function works as expected. Share. Improve this answer. ... I have an alternative method which would prevent from freezing your image.
22.09.2018 · 4. 1. This is an issue with OpenCV's functionality depending on how the code is run. Note that OpenCV's display functionality is limited and is not considered part of the core library; it's just a debugging and development tool. If you run the code via command line, you'll likely not have any issues---but running it in an interpreter can create ...
26.09.2016 · No rational user would ever expect an innocent command like cv2.imshow () to totally crash their Jupyter session and freeze their OS. To expect otherwise is the sign of a deranged contributor. The dreaded cv2.imshow () freezing your system can only be fixed by preemptively adding cv2.waitKey (0).
14.10.2021 · I'm using ROS to get a stream of images from a camera and after processing them I show them using this code: cv2.imshow ("image", img) cv2.waitKey (1) This works for about 30 seconds and then stops working without any errors, apart from the OS (Linux) saying that the window is not responding. EDIT: I noticed that Python uses 100% of the CPU all ...
Problem 1: When calling imshow the image opens in a window, but when closing it crashes. Big Data Jobs. Make sure you are calling destroyAllWindows() if it ...