白色边框，同时使用python和opencv显示完整图像 [英] white border while displaying a full image with python and opencv

问题描述

这个问题与此有关: 如何显示全屏带有python2.7和opencv2.4的图像

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

我想全屏显示黑色图像，我甚至创建了具有相同屏幕分辨率的黑色图像. 但是我在屏幕的顶部和左侧都有一条白色的条纹. 我不知道这是我的屏幕不对齐还是我的代码出现问题.我尝试在2个显示器中显示白色条纹.

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.

因此，如果您在下面运行此代码，会得到全黑图像吗?

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() 

这种方法对我不起作用.您是否知道另一种方式或库来显示全屏图像?

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

仍未解决，我开始认为这是一个openCv错误

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

推荐答案

我遇到了同样的问题，在窗口的左侧和顶部都有1个像素的白色条纹.在多台显示器上进行了测试. OpenCV版本3.4.2

I have the same problem, there is a white stripe of 1 pixel on the left and on the top side of the window. Tested it with multiple monitors. OpenCV version 3.4.2

但是在我的情况下，有一种解决方法可以很好地工作(另请参见 https://gist. github.com/goraj/a2916da98806e30423d27671cfee21b6 ).这是代码:

But there is a workaround which works perfectly fine in my case (see also https://gist.github.com/goraj/a2916da98806e30423d27671cfee21b6). Here's the code:

import cv2
import win32api
import win32gui

cv2.namedWindow("fullScreen", cv2.WINDOW_FREERATIO)
cv2.setWindowProperty("fullScreen",cv2.WND_PROP_FULLSCREEN,cv2.WINDOW_FULLSCREEN)

hwndMain = win32gui.FindWindow(None, "fullScreen")
rgb = win32gui.CreateSolidBrush(win32api.RGB(0, 0, 0))
GCLP_HBRBACKGROUND = -10
win32api.SetClassLong(hwndMain, GCLP_HBRBACKGROUND, rgb)

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