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"/>
