python - 使用 OpenCV Camera Capture 在 PyQt4 中显示网络摄像头流

Question

我正在使用这个 Python 脚本来显示我的网络摄像头:

from opencv.cv import *  
from opencv.highgui import *  

import sys

cvNamedWindow("w1", CV_WINDOW_AUTOSIZE)
camera_index = 0
capture = cvCreateCameraCapture(camera_index)

def repeat():
    global capture #declare as globals since we are assigning to them now
    global camera_index
    frame = cvQueryFrame(capture)
    cvShowImage("w1", frame)
    c = cvWaitKey(10)

    if c == "q":
        sys.exit(0)

if __name__ == "__main__":
    while True:
        repeat()

它运行良好，但我想在我的 Qt 应用程序中设置此显示。如何将 IplImage OpenCV 图像用于 Qt VideoWidget？

Answer 1

看起来我们需要在 Python 中绑定(bind)此 C++ 代码:

QImage& cvxCopyIplImage(const IplImage *pIplImage, QImage &qImage)
{
        if(!CV_IS_IMAGE(pIplImage)) return qImage;

        int w = pIplImage->width;
        int h = pIplImage->height;


        if(qImage.width() != w || qImage.height() != h)
        {
                qImage = QImage(w, h, QImage::Format_RGB32);
        }

        int x, y;
        for(x = 0; x < pIplImage->width; ++x)
        {
                for(y = 0; y < pIplImage->height; ++y)
                {
                        CvScalar color = cvGet2D(pIplImage, y, x);

                        if(pIplImage->nChannels == 1)
                        {
                                int v = color.val[0];

                                qImage.setPixel(x, y, qRgb(v,v,v));
                        }
                        else
                        {
                                int r = color.val[2];
                                int g = color.val[1];
                                int b = color.val[0];

                                qImage.setPixel(x, y, qRgb(r,g,b));
                        }
                }
        }

        if(pIplImage->origin != IPL_ORIGIN_TL)
        {
                qImage = qImage.mirrored(false, true);
        }

        return qImage;
}