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

1         public Bitmap MatToBitmap(Mat image)
2         {
3             return OpenCvSharp.Extensions.BitmapConverter.ToBitmap(image);
4         }

//Mat转BitmapImage
 1         public BitmapImage MatToBitmapImage(Mat image)
 2         {
 3             Bitmap bitmap = MatToBitmap(image);
 4             using (MemoryStream stream = new MemoryStream())
 5             {
 6                 bitmap.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
 7 
 8                 stream.Position = 0;
 9                 BitmapImage result = new BitmapImage();
10                 result.BeginInit();
11                 // According to MSDN, "The default OnDemand cache option retains access to the stream until the image is needed."
12                 // Force the bitmap to load right now so we can dispose the stream.
13                 result.CacheOption = BitmapCacheOption.OnLoad;
14                 result.StreamSource = stream;
15                 result.EndInit();
16                 result.Freeze();
17                 return result;
18             }
19         }

//定义数据属性

 1         private BitmapImage img;
 2 
 3         public BitmapImage Img
 4         {
 5             get { return img; }
 6             set
 7             {
 8                 img = value;
 9                 this.RaisePropertyChanged("Img");
10             }
11         }

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

//2.MainWindow.xaml

1         <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"/>