You could store the image data encoded as something like Base64, and then decode it when you print it to file, like this:
#!perl
use strict;
use warnings;
use MIME::Base64;
my $data = < base64-encoded data here >;
open my $outfile, '>', 'file.gif' or die $!;
binmode $outfile;
print {$outfile} decode_base64($data);
close $outfile;
See the MIME::Base64 manpage for information about Base64 encoding, as well as examples of encoding files.
Update: Oops, sorry Grandfather, you were too quick for me.
Another Update: Link fixed.
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