download of imagenen that is in the DB

as I do to download and to show on screen a previously loaded image to the database

This is the php that seeks to load the image I do with the variable but the only thing that loads is the name of the image

                        <?php
                             include('is_logged.php');//Archivo verifica que 
                    el usario que intenta acceder a la URL esta logueado
                  /* Connect To Database*/
           require_once ("../config/db.php");//Contiene las variables de 
           configuracion para conectar a la base de datos
            require_once ("../config/conexion.php");//Contiene funcion que 
              conecta a la base de datos
         $action = (isset($_REQUEST['action'])&& $_REQUEST['action'] 
        !=NULL)?$_REQUEST['action']:'';
          if (isset($_GET['Nticket'])){
        $incidencia=intval($_GET['Nticket']);
          $query=mysqli_query($con, "select * from ticket where 
         Nticket='".$Nticket."'");
             $rw_user=mysqli_fetch_array($query);
             $count=$rw_ticket['Nticket'];
          if ($Nticket!=1){
    if ($delete1=mysqli_query($con,"DELETE FROM ticket WHERE Nticket='".$Nticket."'")){
    ?>
    <div class="alert alert-success alert-dismissible" role="alert">
      <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
      <strong>Aviso!</strong> Datos eliminados exitosamente.
    </div>
    <?php 
}else {
    ?>
    <div class="alert alert-danger alert-dismissible" role="alert">
      <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
      <strong>Error!</strong> Lo siento algo ha salido mal intenta nuevamente.
    </div>
    <?php

}

} else {
    ?>
    <div class="alert alert-danger alert-dismissible" role="alert">
      <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
      <strong>Error!</strong> No se pudo eliminar ésta  categoría. Existen productos vinculados a ésta categoría. 
    </div>
    <?php
}



           }
            if($action == 'ajax'){
            // escaping, additionally removing everything that could be 
       (html/javascript-) code
  $q = mysqli_real_escape_string($con,(strip_tags($_REQUEST['q'], 
        ENT_QUOTES)));
 $aColumns = array('Nticket');//Columnas de busqueda
 $sTable = "ticket";
 $sWhere = "";
if ( $_GET['q'] != "" )
{
    $sWhere = "WHERE (";
    for ( $i=0 ; $i<count($aColumns) ; $i++ )
    {
        $sWhere .= $aColumns[$i]." LIKE '%".$q."%' OR ";
    }
    $sWhere = substr_replace( $sWhere, "", -3 );
    $sWhere .= ')';
}
$sWhere.=" order by Nticket";
include 'pagination.php'; //include pagination file
//pagination variables
$page = (isset($_REQUEST['page']) && !empty($_REQUEST['page']))?$_REQUEST['page']:1;
$per_page = 10; //how much records you want to show
$adjacents  = 4; //gap between pages after number of adjacents
$offset = ($page - 1) * $per_page;
//Count the total number of row in your table*/
$count_query   = mysqli_query($con, "SELECT count(*) AS numrows FROM $sTable  $sWhere");
$row= mysqli_fetch_array($count_query);
$numrows = $row['numrows'];
$total_pages = ceil($numrows/$per_page);
$reload = './clientes.php';
//main query to fetch the data
$sql="SELECT * FROM  $sTable $sWhere LIMIT $offset,$per_page";
$query = mysqli_query($con, $sql);
//loop through fetched data
if ($numrows>0){
    ?>
<div class="table-responsive">
      <table class="table">
        <tr  class="danger">
            <th>ticket</th>
            <th>Incidencia</th>
            <th>Tema</th>
            <th>Detalle</th>
        </tr>
            <?php
    $nums=0;
        while ($row=mysqli_fetch_array($query)){
                $Nticket=$row['Nticket'];
                $incidencia=$row['incidencia'];
                $tema=$row['tema'];
                $detalle=$row['detalle'];
                 $_FILES['imagen']['name']=$row['imagen'];

                $nums++;



                ?>


            <input type="hidden" value="<?php echo $row['Nticket'];?>" id="Nticket<?php echo $Nticket;?>">
            <input type="hidden" value="<?php echo $row['incidencia'];?>" id="incidencia<?php echo $incidencia;?>">
            <input type="hidden" value="<?php echo $row['tema'];?>" id="tema<?php echo $tema;?>">
            <input type="hidden" value="<?php echo $row['detalle'];?>" id="detalle<?php echo $detalle;?>">
            <input type="hidden" value="<?php echo $row['imagen'];?>" id="imagen<?php echo $_FILES['imagen']['name'];?>">
            <tr>
                <td><?php echo $Nticket; ?></td>
                <td><?php echo $incidencia; ?></td>
                <td><?php echo $tema; ?></td>
                <td><a data-toggle="modal" href="#myModal_<?php echo $nums; ?>"><li 
               class='glyphicon glyphicon-info-sign'></li></a>
            <div class="modal fade" id="myModal_<?php echo $nums; ?>" role="dialog">
       <div class="modal-dialog">
       <div class="modal-content">
      <div class="modal-header">
   <button type="button" class="close" data-dismiss="modal">&times;
          </button>
       <h4 class="modal-title">Detalle de la incidencia</h4>
   </div>
    <div class="modal-body">
    <p><?php echo $detalle;?></p>
    <p><?php echo $_FILES['imagen']['name'];?></p>
 </div>
  <div class="modal-footer">
   <button type="button" class="btn btn-default" data-dismiss="modal">Cerrar</button>
  </div>
  </div>

      </div>
 </div>

test