多个监视器上的OpenCV全屏Windows

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,但当我有多个监视器时,它总是在第一个监视器上显示全屏窗口.有没有办法在第二台显示器上显示？我已尝试设置X / Y和宽度/高度,但启用全屏后似乎会忽略它们.

解决方法

编辑：

有时纯OpenCV代码无法在双显示屏上执行全屏窗口.这是一种Qt方式：

#include <QApplication>
#include <QDesktopWidget>
#include <QLabel>

#include <opencv2/highgui/highgui.hpp>

using namespace cv;

int main(int argc,char *argv[]) 
{
    QApplication app(argc,argv);
    QDesktopWidget dw;
    QLabel myLabel;

    // define dimension of the second display
    int width_second  = 2560;
    int height_second = 1440;

    // define OpenCV Mat
    Mat img = Mat(Size(width_second,height_second),CV_8UC1);

    // move the widget to the second display
    QRect screenres = QApplication::desktop()->screenGeometry(1);
    myLabel.move(QPoint(screenres.x(),screenres.y()));

    // set full screen
    myLabel.showFullScreen();

    // set Qimg
    QImage Qimg((unsigned char*)img.data,img.cols,img.rows,QImage::Format_Indexed8);

    // set Qlabel
    myLabel.setPixmap(QPixmap::fromImage(Qimg));

    // show the image via Qt
    myLabel.show();

    return app.exec();
}

不要忘记将.pro文件配置为：

TEMPLATE = app
QT += widgets
TARGET = main
LIBS += -L/usr/local/lib -lopencv_core -lopencv_highgui

# Input
SOURCES += main.cpp

并在终端编译您的代码：

qmake
make

原版的：

有可能的.

这是一个可用的演示代码,用于在第二个显示屏上显示全屏图像.从How to display different windows in different monitors with OpenCV开始提示：

#include <opencv2/highgui/highgui.hpp>

using namespace cv;

int main ( int argc,char **argv )
{
    // define dimension of the main display
    int width_first  = 1920;
    int height_first = 1200;

    // define dimension of the second display
    int width_second  = 2560;
    int height_second = 1440;

    // move the window to the second display 
    // (assuming the two displays are top aligned)
    namedWindow("My Window",CV_WINDOW_NORMAL);
    moveWindow("My Window",width_first,height_first);
    setWindowProperty("My Window",CV_WINDOW_FULLSCREEN);

    // create target image
    Mat img = Mat(Size(width_second,CV_8UC1);

    // show the image
    imshow("My Window",img);
    waitKey(0);

    return 0;
}