You can change the column's CellContentTemplate to a DataTemplate as demonstrates in the Providing a cell-content template example in the documentation:

<Grid xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid">
  <Grid.Resources>
    <xcdg:DataGridCollectionViewSource x:Key="cvs_products"
                                    Source="{Binding Source={x:Static Application.Current},
                                                      Path=Products}"/>
  </Grid.Resources>
   <xcdg:DataGridControl x:Name="ProductsGrid"
                         ItemsSource="{Binding Source={StaticResource cvs_products}}">
      <xcdg:DataGridControl.Columns>

        <xcdg:Column FieldName="Discontinued">
           <xcdg:Column.CellContentTemplate>
              <DataTemplate>
                 <Image x:Name="img" Source="D:\true.png" Stretch="None" />
                    <DataTemplate.Triggers>
                       <DataTrigger Binding="{Binding}" Value="False">
                         <Setter TargetName="img" Property="Source" Value="D:\false.png" />
                       </DataTrigger>
                    </DataTemplate.Triggers>
              </DataTemplate>
           </xcdg:Column.CellContentTemplate>
        </xcdg:Column>
      </xcdg:DataGridControl.Columns>
   </xcdg:DataGridControl>
</Grid>