diff --git a/AIStudio.Wpf.DiagramDesigner/Converters/ClipConverter.cs b/AIStudio.Wpf.DiagramDesigner/Converters/ClipConverter.cs
index 8c5aadd..dbb4482 100644
--- a/AIStudio.Wpf.DiagramDesigner/Converters/ClipConverter.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Converters/ClipConverter.cs
@@ -16,8 +16,8 @@ namespace AIStudio.Wpf.DiagramDesigner
             {
                 if (value is ImageItemViewModel imageItemViewModel)
                 {
-                    double xradio = imageItemViewModel.ItemWidth / imageItemViewModel.ImageWidth;
-                    double yradio = imageItemViewModel.ItemHeight / imageItemViewModel.ImageHeight;
+                    double xradio = imageItemViewModel.ImageWidth == 0 ? 0 : imageItemViewModel.ItemWidth / imageItemViewModel.ImageWidth;
+                    double yradio = imageItemViewModel.ImageHeight == 0 ? 0 : imageItemViewModel.ItemHeight / imageItemViewModel.ImageHeight;
                     if (para == "Clip")
                     {
                         if (imageItemViewModel.ClipMode == ClipMode.RectangleGeometry)
@@ -29,7 +29,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                             }
                             else
                             {
-                                rectangle.Rect = new System.Windows.Rect(imageItemViewModel.ResizeMargin.Left, imageItemViewModel.ResizeMargin.Top , imageItemViewModel.ItemWidth - (imageItemViewModel.ResizeMargin.Left + imageItemViewModel.ResizeMargin.Right), imageItemViewModel.ItemHeight - (imageItemViewModel.ResizeMargin.Top + imageItemViewModel.ResizeMargin.Bottom));
+                                rectangle.Rect = new System.Windows.Rect(imageItemViewModel.ResizeMargin.Left, imageItemViewModel.ResizeMargin.Top, imageItemViewModel.ItemWidth - (imageItemViewModel.ResizeMargin.Left + imageItemViewModel.ResizeMargin.Right), imageItemViewModel.ItemHeight - (imageItemViewModel.ResizeMargin.Top + imageItemViewModel.ResizeMargin.Bottom));
                             }
                             return rectangle;
                         }
@@ -37,14 +37,14 @@ namespace AIStudio.Wpf.DiagramDesigner
                         {
                             EllipseGeometry ellipse = new EllipseGeometry();
                             if (imageItemViewModel.ResizeMode == false)
-                            {                               
+                            {
                                 ellipse.Center = new Point(imageItemViewModel.ResizeMargin.Left * xradio + imageItemViewModel.ItemWidth / 2, imageItemViewModel.ResizeMargin.Top * yradio + imageItemViewModel.ItemHeight / 2);
                                 ellipse.RadiusX = imageItemViewModel.ItemWidth / 2;
                                 ellipse.RadiusY = imageItemViewModel.ItemHeight / 2;
                             }
                             else
                             {
-                                ellipse.Center = new Point(imageItemViewModel.ResizeMargin.Left + (imageItemViewModel.ItemWidth - imageItemViewModel.ResizeMargin.Left - imageItemViewModel.ResizeMargin.Right) / 2, imageItemViewModel.ResizeMargin.Top + (imageItemViewModel.ItemHeight - imageItemViewModel.ResizeMargin.Top  - imageItemViewModel.ResizeMargin.Bottom)/ 2);
+                                ellipse.Center = new Point(imageItemViewModel.ResizeMargin.Left + (imageItemViewModel.ItemWidth - imageItemViewModel.ResizeMargin.Left - imageItemViewModel.ResizeMargin.Right) / 2, imageItemViewModel.ResizeMargin.Top + (imageItemViewModel.ItemHeight - imageItemViewModel.ResizeMargin.Top - imageItemViewModel.ResizeMargin.Bottom) / 2);
                                 ellipse.RadiusX = (imageItemViewModel.ItemWidth - imageItemViewModel.ResizeMargin.Left - imageItemViewModel.ResizeMargin.Right) / 2;
                                 ellipse.RadiusY = (imageItemViewModel.ItemHeight - imageItemViewModel.ResizeMargin.Top - imageItemViewModel.ResizeMargin.Bottom) / 2;
                             }
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/ImageItemViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/ImageItemViewModel.cs
index c7b273f..08ec4cb 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/ImageItemViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/ImageItemViewModel.cs
@@ -61,6 +61,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             {
                 this.Icon = designer.Icon;
                 Suffix = Path.GetExtension(this.Icon).ToLower();
+                InitWidthAndHeight();
             }
         }