我有一个显示全屏窗口的 OpenCV 应用程序，通过：
cv::namedWindow("myWindow", CV_WINDOW_NORMAL)
cv::setWindowProperties("myWindow", CV_WND_PROP_FULLSCREEN, CV_WINDOW_FULLSCREEN)
它工作正常，但是当我有多个显示器时，它总是在第一个显示器上显示全屏窗口。有什么办法可以在第二台显示器上显示吗？我尝试过设置 X/Y 和宽度/高度，但一旦启用全屏，它们似乎就会被忽略。
我尝试了不同的方法来使其工作，但不幸的是，使用 OpenCV 似乎不可能做到这一点。您唯一能做的可能就是使用当前代码在主（主）屏幕上显示一个窗口并手动处理第二个窗口 - 设置窗口位置，调整图像大小，然后使用imshow函数来显示它。这是一些例子：
void showWindowAlmostFullscreen(cv::Mat img, std::string windowTitle, cv::Size screenSize, cv::Point screenZeroPoint)
{
screenSize -= cv::Size(100, 100); //leave some place for window title bar etc
double xScallingFactor = (float)screenSize.width / (float)img.size().width;
double yScallingFactor = (float)screenSize.height / (float)img.size().height;
double minFactor = std::min(xScallingFactor, yScallingFactor);
cv::Mat temp;
cv::resize(img, temp, cv::Size(), minFactor, minFactor);
cv::moveWindow(windowTitle, screenZeroPoint.x, screenZeroPoint.y);
cv::imshow(windowTitle, temp);
}
int _tmain(int argc, _TCHAR* argv[])
{
cv::Mat img1 = cv::imread("D:\\temp\\test.png");
cv::Mat img2;
cv::bitwise_not(img1, img2);
cv::namedWindow("img1", CV_WINDOW_AUTOSIZE);
cv::setWindowProperty("img1", CV_WND_PROP_FULLSCREEN, CV_WINDOW_FULLSCREEN);
cv::namedWindow("img2");
while(cv::waitKey(1) != 'q')
{
cv::imshow("img1", img1);
cv::setWindowProperty("img1", CV_WND_PROP_FULLSCREEN, CV_WINDOW_FULLSCREEN);
showWindowAlmostFullscreen(img2, "img2", cv::Size(1366, 768), cv::Point(260, 1080));
}
}
and the result:
Screen size and screen zero point (i don't know whether this is a correct name of this point - generally it's just a point in which there is screen (0,0) point) you can get using some other library or from windows control panel. Screen zero point will display when you will start moving screen:
