WPF中UI元素跨线程访问

private void Cam_NewFrame(object sender, AForge.Video.NewFrameEventArgs eventArgs)
        {
            if (m_SingleScaleImage)
            {//全屏
                if (m_Index >= ManagerCam.inst().Count) m_Index = 0;
                Camfi camera = ManagerCam.inst()[m_Index];
                if (camera.device != sender) return;//不匹配设备退出
                IntPtr hBitmap = eventArgs.Frame.GetHbitmap();
                BitmapSource image = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(hBitmap,
                        IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
                image.Freeze();
                Dispatcher.Invoke(new Action(() =>
                {
                    gallery_single_image.Source = BitmapFrame.Create(image);
                }));
                GC.Collect();
                GC.WaitForPendingFinalizers();
                //释放资源
                if (!DeleteObject(hBitmap))
                    throw new System.ComponentModel.Win32Exception();
            }
            else
            {//显示所有摄像头
                Camfi camera = ManagerCam.inst().Where(o => o.device == sender).First();
                if (camera == null) return;//没有找到设备退出
                IntPtr hBitmap = eventArgs.Frame.GetHbitmap();
                BitmapSource image = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(hBitmap,
                        IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
                image.Freeze();
                Dispatcher.Invoke(new Action(() =>
                {
                    camera.imageBox.Source = image;
                }));
                GC.Collect();
                GC.WaitForPendingFinalizers();
                //释放资源
                if (!DeleteObject(hBitmap))
                    throw new System.ComponentModel.Win32Exception();
            }
        }