public FormCapture() { InitializeComponent(); _capture = new VideoCapture(); _capture.SetCaptureProperty(Emgu.CV.CvEnum.CapProp.FrameHeight, 320);//设置捕捉到帧的高度为320 _capture.SetCaptureProperty(Emgu.CV.CvEnum.CapProp.FrameHeight, 240);//设置捕捉到帧的宽度为2