Resizing the window doesn't properly scale the image within.

[Semnodime]

System Information

Steps to reproduce

property	value
operating system	Linux Mint 21.3 Cinnamon
architecture	x86
opencv-python version	4.0.9.80

Detailed description

Resizing the window doesn't properly scale the image within.

Observe the variable padding on the right window border:

Steps to reproduce

import numpy as np
import cv2


def main():
    # Generate a random 32x160x3 image
    random_image = np.random.randint(low=0, high=256, size=(32, 160, 3), dtype=np.uint8)

    # Create a named window to display the image
    window_name = 'random image'
    cv2.namedWindow(window_name, cv2.WINDOW_NORMAL)
    cv2.imshow(window_name, random_image)

    # Resize it iteratively
    for width in range(random_image.shape[1]):
        cv2.setWindowTitle(window_name, str(width))
        cv2.resizeWindow(window_name, width, 100)
        cv2.waitKey(50)

    # Exit
    cv2.destroyAllWindows()


if __name__ == '__main__':
    main()

Issue submission checklist

• I report the issue, it's not 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 issue is still there
• There is reproducer code and related data files (videos, images, onnx, etc)