在 PyQt 的主要 window 之上显示 OpenCv window

Question

我做了一个 opencv 项目，它处理来自视频的输入流并显示处理后的输出。我使用 PyQt 按钮从一个输出切换到另一个。我的 PyQt window 几乎覆盖了整个屏幕，当我点击我的按钮时，opencv window 仍然在 PyQt window 后面。此外，我已将 PyQt 的主要 window 作为我的父 window。如何将 opencv window 置于 PyQt window 之上。我搜索了 cvGetWindowHandle()，但没有找到 python.

的实现

我用过PyQt4和opencv2，PyQtwindow还没有用QtDesigner设计过

Answer 1

您始终可以将 OpenCV window 包装在 Qt 小部件中...

class QtCapture(QtGui.QWidget):
    def __init__(self, *args):
        super(QtGui.QWidget, self).__init__()

        self.fps = 24
        self.cap = cv2.VideoCapture(*args)

        self.video_frame = QtGui.QLabel()
        lay = QtGui.QVBoxLayout()
        lay.setMargin(0)
        lay.addWidget(self.video_frame)
        self.setLayout(lay)

    def setFPS(self, fps):
        self.fps = fps

    def nextFrameSlot(self):
        ret, frame = self.cap.read()
        # OpenCV yields frames in BGR format
        frame = cv2.cvtColor(frame, cv2.cv.CV_BGR2RGB)
        img = QtGui.QImage(frame, frame.shape[1], frame.shape[0], QtGui.QImage.Format_RGB888)
        pix = QtGui.QPixmap.fromImage(img)
        self.video_frame.setPixmap(pix)

    def start(self):
        self.timer = QtCore.QTimer()
        self.timer.timeout.connect(self.nextFrameSlot)
        self.timer.start(1000./self.fps)

    def stop(self):
        self.timer.stop()

    def deleteLater(self):
        self.cap.release()
        super(QtGui.QWidget, self).deleteLater()

...随心所欲：

class ControlWindow(QtGui.QWidget):
    def __init__(self):
        QtGui.QWidget.__init__(self)
        self.capture = None

        self.start_button = QtGui.QPushButton('Start')
        self.start_button.clicked.connect(self.startCapture)
        self.quit_button = QtGui.QPushButton('End')
        self.quit_button.clicked.connect(self.endCapture)
        self.end_button = QtGui.QPushButton('Stop')

        vbox = QtGui.QVBoxLayout(self)
        vbox.addWidget(self.start_button)
        vbox.addWidget(self.end_button)
        vbox.addWidget(self.quit_button)
        self.setLayout(vbox)
        self.setWindowTitle('Control Panel')
        self.setGeometry(100,100,200,200)
        self.show()

    def startCapture(self):
        if not self.capture:
            self.capture = QtCapture(0)
            self.end_button.clicked.connect(self.capture.stop)
            self.capture.setFPS(30)
            self.capture.setParent(self)
            self.capture.setWindowFlags(QtCore.Qt.Tool)
        self.capture.start()
        self.capture.show()

    def endCapture(self):
        self.capture.deleteLater()
        self.capture = None


if __name__ == '__main__':
    import sys
    app = QtGui.QApplication(sys.argv)
    window = ControlWindow()
    sys.exit(app.exec_())

在 PyQt 的主要 window 之上显示 OpenCv window

Display OpenCv window on top of PyQt's main window

python

opencv

pyqt4