OpenCV图像Mat格式转换为QT中QImage并显示在graphicsView上或者图片显示控件上面，原理都一样

如题：
附转换代码（加上工业相机拍照函数）：

QImage Camera::VideoCamera(){
	Mat openCvImage;
	try {
		// 开始抓取c_countOfImagesToGrab images.
		//相机默认设置连续抓取模式
		cameraM.StartGrabbing(c_countOfImagesToGrab, GrabStrategy_LatestImageOnly);
		//抓取结果数据指针
		Pylon::CGrabResultPtr ptrGrabResult;
		Pylon::CPylonImage pylonImage;
		
		
			// 等待接收和恢复图像，超时时间设0置为5000 ms.		
			cameraM.RetrieveResult(5000, ptrGrabResult, Pylon::TimeoutHandling_ThrowException);
		if (cameraM.IsGrabbing())
		{			
				//如果图像抓取成功
				if (ptrGrabResult->GrabSucceeded())
				{
					//将抓取的缓冲数据转化成pylon image.

					formatConverterM.Convert(pylonImage, ptrGrabResult);				
					// 将 pylon image转成OpenCV image.
					openCvImage = cv::Mat(ptrGrabResult->GetHeight(), ptrGrabResult->GetWidth(), CV_8UC3, (uint8_t *)pylonImage.GetBuffer());					
				
				}
		}				
		
		
		
		
		Mat rgb;
		cvtColor(openCvImage, rgb, CV_BGR2RGB);
		QImage img = QImage((const unsigned char*)(rgb.data),