Hi tel2,
As james28909 said the GD module can do what you need.
You can create a GD object from the file:
$image = GD::Image->new($filename);
and then add the text
$image->string($font,$x,$y,$string,$color);
and save as png
$png_data = $image->png;
open (OUTFILE,"imagewithtext.png");
binmode OUTFILE;
print OUTFILE $png_data;
close OUTFILE;
Regards
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