图像不会显示在WPF磁贴上

Question

此代码来自Kinect for Windows开发人员工具包2.0中提供的示例。我希望图片覆盖瓷砖，但它不起作用。

这是Xaml代码：

    <ItemsControl Grid.Row="0" Name="itemsControl" ItemTemplate="{StaticResource Kinect350x350ItemTemplate}" Button.Click="ButtonClick
      <ItemsControl.ItemsPanel>
          <ItemsPanelTemplate>
             <WrapPanel VerticalAlignment="Center" Orientation="Vertical" Margin="75,0,75,0" />
          </ItemsPanelTemplate>
      </ItemsControl.ItemsPanel>
   </ItemsControl>

这是我的StaticResource Kinect350x350ItemTemplate

    <DataTemplate x:Key="Kinect350x350ItemTemplate">
    <Button Margin="5" Style="{StaticResource KinectTileButton}">
        <Grid HorizontalAlignment="Left" Width="350" Height="350">
            <Border Background="{StaticResource ListViewItemPlaceholderBackgroundThemeBrush}">
                <Image Source="{Binding Image}" Stretch="UniformToFill" AutomationProperties.Name="{Binding Title}"/>
            </Border>
            <StackPanel VerticalAlignment="Bottom" Background="{StaticResource ListViewItemOverlayBackgroundThemeBrush}">
                <TextBlock Text="{Binding Title}" Foreground="{StaticResource ListViewItemOverlayForegroundThemeBrush}" Style="{StaticResource TitleTextStyle}" Height="60" Margin="15,0,15,0"/>
                <TextBlock Text="{Binding Subtitle}" Foreground="{StaticResource ListViewItemOverlaySecondaryForegroundThemeBrush}" Style="{StaticResource CaptionTextStyle}" TextWrapping="NoWrap" Margin="15,0,15,10"/>
            </StackPanel>
        </Grid>
    </Button>
</DataTemplate>

据我所知，这一行没有显示我的图像：

    <Image Source="{Binding Image}" Stretch="UniformToFill" AutomationProperties.Name="{Binding Title}"/>

以下是数据模型：

    private static Uri darkGrayImage = new Uri("thumbs/DarkGray.png", UriKind.Relative);
    private static Uri mediumGrayImage = new Uri("thumbs/mediumGray.png", UriKind.Relative);
    private static Uri lightGrayImage = new Uri("thumbs/lightGray.png", UriKind.Relative);
    private static Uri AUMImage = new Uri("thumbs/aum.jpg", UriKind.Relative);
    public KuwaitDataSource()
    {
        string itemContent = string.Format(
                                CultureInfo.CurrentCulture,
                                "Item Content: {0}\n\n{0}\n\n{0}\n\n{0}\n\n{0}\n\n{0}\n\n{0}",
                                "Bla-Bla-Bla");

        var group1 = new KuwaitDataCollection(
                "Group-1",
                "Group Title: 3",
                "Group Subtitle: 3",
                KuwaitDataSource.AUMImage,
                "Group Description: Some text here.");
        group1.Items.Add(
                new SampleDataItem(
                    "Group-1-Item-1",
                    "Egaila",
                    "Egaila is a quite city to live. It has a great university AUM and big shopping centers.",
                    KuwaitDataSource.AUMImage,
                    "A map of Egaila, enabling scrolling and zooming.",
                    itemContent,
                    group1,
                    typeof(Egaila)));
           this.AllGroups.Add(group1);
    }

在输出中我只有ListViewItemPlaceholderBackgroundThemeBrush，没有图像...我错过了什么？