You can use Custom JavaScript to achieve it, following is the sample code you can use, but this won't work when download submitted form or save form to repository.

$(document).ready(function () { 
    displayUploadImage (true)
});

$(document).on('updatevalidation',function(){
  if($("input[name='routingResumeId']").val() == '') 
    displayUploadImage (false)  
});

function displayUploadImage(isAll) {
    var iml = ['jpg','jpeg','gif','png'];
    var total= $('.files tbody .file').length;
    $('.files tbody .file').each(function(index) {
        if(isAll){
            if ($(this).find('a').length && $.inArray($(this).find('a').attr('title').match(/\.(\w{3,4})$/)[1],iml)>-1){
                var ims = $(this).find('a').attr('href'),
                    imr = $('<img style="width:300px;" />');
                imr.attr('src',ims);
                $('<tr class="image"><td colspan=3>'+imr.prop('outerHTML')+'</td></tr>').insertAfter($(this).find('a').closest('tr'));

            }
        }
        else
            if(index=== total-1)
            {
              if ($(this).find('a').length && $.inArray($(this).find('a').attr('title').match(/\.(\w{3,4})$/)[1],iml)>-1&&(!$(this).next('.image').length)){
                    var ims = $(this).find('a').attr('href'),
                        imr = $('<img style="width:300px;" />');
                    imr.attr('src',ims);
                    $('<tr class="image"><td colspan=3>'+imr.prop('outerHTML')+'</td></tr>').insertAfter($(this).find('a').closest('tr'));

                }
            } 
    })
}