按钮模板无法清晰呈现图像

Here is my button template,

这是我的按钮模板，

<Microsoft_Windows_Themes:ButtonChrome 
   x:Name="Chrome" 
   Background="{TemplateBinding Background}" 
   BorderBrush="{TemplateBinding BorderBrush}" 
   RenderDefaulted="{TemplateBinding IsDefaulted}" 
   RenderMouseOver="{TemplateBinding IsMouseOver}" 
   RenderPressed="{TemplateBinding IsPressed}">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <Image 
               Source="{TemplateBinding ImageSource}" 

               RenderOptions.BitmapScalingMode="NearestNeighbor"

               SnapsToDevicePixels="True"

               HorizontalAlignment="Center"
               VerticalAlignment="Center"
              Stretch="None"
               />
        <ContentPresenter 
            Grid.Column="1"
            HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" 
            Margin="{TemplateBinding Padding}" 
            VerticalAlignment="{TemplateBinding VerticalContentAlignment}" 
            SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" 
            RecognizesAccessKey="True"/>
    </Grid>
</Microsoft_Windows_Themes:ButtonChrome>
<Micr