That means it's expecting the contents of the file. 
my $raw_image_data = do {
   open(my $fh, '<:raw:perlio', $image_qfn)
      or die("Can't open image file \"$image_qfn\": $!\n);
   local $/;
   <$fh>;
};

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In reply to Re: raw image data? by ikegami
in thread raw image data? by 23skiddoo

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