使用opencvsharp通过mvvm在image中显示图片

在wpf mvvm框架中，通过Image控件的 Source属性绑定BitmapImage动态显示图片

1.MainWindowVIewModel.cs

using System.Windows.Media.Imaging; //使用BitMapImage类型
using System.Drawing;

//Mat转Bitmap

        public Bitmap MatToBitmap(Mat image)
        {
            return OpenCvSharp.Extensions.BitmapConverter.ToBitmap(image);
        }

//Mat转BitmapImage
 1         public BitmapImage MatToBitmapImage(Mat image)
        {
            Bitmap bitmap = MatToBitmap(image);
            using (MemoryStream stream = new MemoryStream())
            {
                bitmap.Save(stream, System.Drawing.Imaging.ImageFormat.Png);

                stream.Position = 0;
                BitmapImage result = new BitmapImage();
                result.BeginInit();
                // According to MSDN, "The default OnDemand cache option retains access to the stream until the image is needed."
                // Force the bitmap to load right now so we can dispose the stream.
                result.CacheOption = BitmapCacheOption.OnLoad;
                result.StreamSource = stream;
                result.EndInit();
                result.Freeze();
                return result;
            }
        }

//定义数据属性

        private BitmapImage img;

        public BitmapImage Img
        {
            get { return img; }
            set
            {
                img = value;
                this.RaisePropertyChanged("Img");
            }
        }

                Mat image=new Mat(FileNames[i],ImreadModes.Unchanged); //通过路径读入Mat类型的image
                this.Img = MatToBitmapImage(image); //将image转换为BitmapImage传给Img，Img与Source绑定。

//2.MainWindow.xaml

        <Image HorizontalAlignment="Left" Grid.Row="1" Grid.Column="0" Margin="20,20,0,0" Width="800" Source="{Binding Img}" Grid.RowSpan="2" Height="800" VerticalAlignment="Top"/>