需要使用php根据表的id将数据库中的图像显示到fpdf文档中

我的数据库中的图像表名为pendaftaran，图像变量名为upload_foto。 但是当我使用下面的脚本时，图像不会显示在文档中

<?php
session_start();
include '../../koneksi/koneksi.php';
include 'fpdf/Code39.php';

$rows = $_GET['Id'];

$query  = "SELECT * FROM pendaftaran WHERE Id = $rows";

$exec   =   mysqli_query($conn, $query);

$data   = array();

while ($row = mysqli_fetch_array($exec)) {
  $data[] = $row;
}

$pdf = new PDF_Code39();
$pdf->AliasNbPages();
$pdf->AddPage();
$pdf->Image('images/pas_cetak.png', 10, 10,180, 100);


$pdf->SetFont('Times','',12);

$nomor = 1;
    $pdf->SetFont('Times','',18);
    $pdf->SetXY(40, 33);
    $pdf->cell(80, 7, substr(strtoupper($data[0]['tanggal_pendaftaran']), 0, 20), 0, 4, 'L'); // for this the data can display properly

    $pdf->SetXY(15, 99);
    $pdf->SetFont('Times','',30);
    $pdf->cell(80, 7, substr(strtoupper($data[0]['upload_foto']), 0, 20), 0, 4, 'L'); // for this cell the image not display
  $pdf->Ln(10);

$pdf->Output();
?>