Camera Capture Qt/OpenCV

CMainWindow::CMainWindow(QWidget *parent)
    : QMainWindow(parent),
    m_CameraHandler(0),
    m_ImageWidget(0),
    m_ProcessedImageWidget(0),
    m_ImageProcessor(0)
    {
    //Setup GUI
    ui.setupUi(this);
    //Connect start menu to the CameraHandler startStop connection
    connect(ui.actionFrom_webcam,SIGNAL(triggered()),this,SLOT(startStopCamera()));
    //Setup Widgets and camera handler
    this->setupImageWidget();
    this->setupProcessedImageWidget();
    this->setupCameraHandler();
    m_ImageProcessor=new CImageDenoiserL2();
    //Connections to send images from the camera handler to the gui
    connect(m_CameraHandler,SIGNAL(sendFrame(QImage)),m_ImageWidget,SLOT(drawFrame(QImage)));
    connect(m_CameraHandler,SIGNAL(sendProcessedFrame(QImage)),m_ProcessedImageWidget,SLOT(drawFrame(QImage)));
    //Connection for L2 denoising parameters
    connect(ui.sliderTheta,SIGNAL(valueChanged(int)),m_ImageProcessor,SLOT(setTheta(int)));
    connect(ui.sliderMaxIter,SIGNAL(valueChanged(int)),m_ImageProcessor,SLOT(setMaxIter(int)));
    //Set L2 image processor as default
    m_CameraHandler->setImageProcessor(m_ImageProcessor);
    //Quit app on close
    this->setAttribute(Qt::WA_DeleteOnClose);
    qDebug() << "Main window thread ID" << this->thread();
}

CMainWindow::~CMainWindow(){
    m_CameraHandler->deleteLater();
    m_ImageWidget->deleteLater();
    m_ProcessedImageWidget->deleteLater();
    emit windowClosed();
    qDebug() << "CMainWindow deleted";
}

CCameraHandler::CCameraHandler(QObject *parent):
    QObject(parent),
    m_CameraCapture(),
    m_ImageProcessor(),
    m_CameraCaptureThread(),
    m_ProcessingThread(),
    m_CurrentFrame(400,400,CV_8UC3){

    m_CameraCaptureThread= new QThread();
    m_ProcessingThread= new QThread();
    m_CameraCapture= new CCameraCapture();
    //Move camera capture object to thread
    m_CameraCapture->moveToThread(m_CameraCaptureThread);
    //Connect error signal)
    QObject::connect(m_CameraCapture, SIGNAL(error(QString,QString)), this, SLOT(reportError(QString,QString)));
    //Connect the finished signal of the worker class to the thread for quitting the loop
    QObject::connect(m_CameraCapture, SIGNAL(finished()), m_CameraCaptureThread, SLOT(quit()));
    //This connections guarantees that the *m_CVideoCapture is automatically deleted if the event loop of the thread is terminated. Therefore, m_CVideoCapture does not need to be released manually if the capturing process is stopped.
    QObject::connect(m_CameraCaptureThread, SIGNAL(finished()), m_CameraCaptureThread, SLOT(deleteLater()));
    QObject::connect(m_CameraCapture, SIGNAL(finished()), m_CameraCapture, SLOT(deleteLater()));

    //Connect sendFrame to update frame for displaying the current frame
    QObject::connect(m_CameraCapture, SIGNAL(sendFrame(cv::Mat)), this, SLOT(receiveFrame(cv::Mat)));
    QObject::connect(this, SIGNAL(startGrabbing()), m_CameraCapture, SLOT(startGrabbing()));
    QObject::connect(this, SIGNAL(stopGrabbing()), m_CameraCapture, SLOT(stopGrabbing()));
    m_CameraCaptureThread->start();
    m_CameraCapture->openCamera();
    QObject::connect(this, SIGNAL(startGrabbing()), this, SLOT(getNewFrame()));
    m_ProcessingThread->start();
}

CCameraHandler::~CCameraHandler(void){
    m_CameraCapture->exitThread();
    m_ImageProcessor->exitThread();
    qDebug() << "CCameraHandler deleted";
}

CCameraCapture::~CCameraCapture(void){
    m_Cap.release();
    qDebug() << "CCameraCapture deleted";
}