Php TCPDF条码问题

我使用以下代码生成1D条形码

//set standard size for label 174mmx100mm, dont pass orientation as that seems to break things
$pdf = new tcpdf('', PDF_UNIT, array(174,100), true, 'UTF-8', false);

$pdf->IncludeJS("print(true);");

$pdf->SetFontSize(10);

// remove default header/footer
$pdf->setPrintHeader(false);
$pdf->setPrintFooter(false);

//set image scale factor
$pdf->setImageScale(1.53);

//turn off auto page breaks which aren't useful here
$pdf->SetAutoPageBreak(false);

//set some language-dependent strings
$pdf->setLanguageArray($l);

// set JPEG quality
$pdf->setJPEGQuality(100);

// set default monospaced font
$pdf->SetDefaultMonospacedFont(PDF_FONT_MONOSPACED);

$pdf->SetDisplayMode('real', 'SinglePage');

$style = array(
            'position' => '',
            'align' => 'C',
            'stretch' => false,
            'fitwidth' => true,
            'cellfitalign' => '',
            'border' => false,
            'padding' => 0,
            'hpadding' => 'auto',
            'vpadding' => 'auto',
            'fgcolor' => array(0,0,0),
            'bgcolor' => false, //array(255,255,255),
            'font' => 'helvetica',
            'fontsize' => 8,
            'stretchtext' => 4
        );

$pdf->Text(self::pxtomm(124), self::pxtomm(206), $la_barcodedata['barcode']);

//tall 1d barcode
$pdf->write1DBarcode('2245950000007601AKL001AS', 'C128B', self::pxtomm(72), self::pxtomm(226), self::pxtomm(279), self::pxtomm(57), 0.4, $style, 'N');


// The conversion method just for reference
private function pxtomm($pi_pixels)
{
    return $pi_pixels * 0.264583333;
}

现在的问题是生成pdf文档在IE、FF、Chrome中看起来不同。无法扫描从IE打印的所有条形码，因为条形码行重叠，使其看起来像单个块。如果我放大和缩小，我可以看到不同的线条，但不能看到实际的页面大小

避免这种情况并使其在所有浏览器中看起来一致的最佳方法是什么