Here is a simple example ImageMagick

#!/usr/bin/perl

use Image::Magick;
#print "Content-type: image/jpg\n\n"; 

my $jpeg_file = 'frontpage.jpg';
my $im = Image::Magick->new();
my $rc = $im->Read($jpeg_file);
 die $rc if $rc;
                       
$rc = $im->Annotate(
     gravity => "Center",
     text => "Hello ImageMagick!",
     font => "arial.ttf",
     stroke => "red",
     fill=> "red",
     pointsize => 28,
);
  die $rc if $rc;

$rc = $im->Write("$0.jpg");
   die $rc if $rc;
[download]

And here is one for GD

#!/usr/bin/perl
use warnings;
use strict;

use GD;
use GD::Text::Align;

@ARGV or die "Need an image file\n";

for my $img_file (@ARGV)
{
    my $gd = GD::Image->new($img_file) or die;
    my ($w, $h) = $gd->getBounds();
                        
    my $gdt = GD::Text::Align->new($gd,
       valign => 'bottom',
       halign => 'right',
       text   => 'Some Text',
       colour => $gd->colorResolve(0,0,0),
    ) or die;
    $gdt->set_font('arial', $h/10) or die;
    $gdt->draw($w, $h, 0) or die;

    open(GD, ">$0.png") or die;
    binmode GD;
    print GD $gd->png;
    close GD;
}
[download]

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