OpenCV shows white screen when using cv2.setWindowProperty(“Image”, cv2.WND_PROP_FULLSCREEN, cv2.WINDOW_FULLSCREEN)

[gnohgnij]

System Information

OpenCV version: 4.7.0.68
Operating System / Platform: macOS Ventura 13.1, Apple Macbook Air M1
Python version 3.9.15

Detailed description

When trying to set the window to fullscreen using cv2.setWindowProperty("Image", cv2.WND_PROP_FULLSCREEN, cv2.WINDOW_FULLSCREEN), the window shows a white screen instead of the webcam capture/image file that is being read. When the line of code is commented out, the window correctly shows webcam capture/image file.

Steps to reproduce

1. Webcam

import cv2
cap = cv2.VideoCapture(0)

cv2.namedWindow("Image", cv2.WND_PROP_FULLSCREEN)
cv2.setWindowProperty("Image", cv2.WND_PROP_FULLSCREEN, cv2.WINDOW_FULLSCREEN)

while cap.isOpened():
    success, image = cap.read()

    cv2.imshow("Image", image)

    if cv2.waitKey(1) & 0xFF == 27:
      break


cv2.destroyAllWindows()
cap.release()

2. Reading image file

import cv2

img = cv2.imread('path/to/image')
cv2.namedWindow("Image", cv2.WND_PROP_FULLSCREEN)
cv2.setWindowProperty("Image", cv2.WND_PROP_FULLSCREEN, cv2.WINDOW_FULLSCREEN)

cv2.imshow("Image", img)
cv2.waitKey(0)

EDIT: I've downgraded opencv-python to 4.4.0.46 and now it works

[asmorkalov]

Duplicates opencv/opencv#23118