37557

white border while displaying a full image with python and opencv

This question is related with this one: how to display a full screen images with python2.7 and opencv2.4

I want to display a black image full screen, i have created even a black image with the same resolution of the screen. But i get a little white stripe on top and on the left of the screen. I don't know if it is a problem of my screen that is not aligned or its my code. I have tried in 2 displays and the white stripe is displayed.

So if you run this code below, do you get a full black image?

import numpy as np import cv2 if __name__ == "__main__": img = cv2.imread('nero.jpg') cv2.namedWindow("test", cv2.WND_PROP_FULLSCREEN) cv2.setWindowProperty("test", cv2.WND_PROP_FULLSCREEN, cv2.cv.CV_WINDOW_FULLSCREEN) cv2.imshow("test",img) cv2.waitKey(0) cv2.destroyAllWindows()

EDIT : This method is not working for me. do you know anther way or libraries to display a full screen image?

EDIT 2: still unsolved, i am starting to think that it is an openCv bug

Answer1:

Yes I do.

img = np.zeros((900, 1600)) #my aspect ratio is 16x9 cv2.namedWindow("test", cv2.WND_PROP_FULLSCREEN) cv2.setWindowProperty("test", cv2.WND_PROP_FULLSCREEN, cv2.cv.CV_WINDOW_FULLSCREEN) cv2.imshow("test",img) cv2.waitKey(0)

gives me a fully black screen. Are you sure you are using the right aspect ratio?

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