 Afterwards the data is written to file.</p>

<pre><code> $hidden{slice} = zeroes(byte(),200,265);
 my $tmp = $hidden{data};
 $hidden{slice} .= $tmp(0:199,0:264);
 write_png($hidden{slice},&quot;hidden-200x265.png&quot;);</code></pre>

<p>So this is our final result:</p>

<table><tr><td>
	<img width=200 src="hidden-pdl-200x265.png">
</td><td>
	<b>hidden-pdl-200x265.png</b><br>
	<br>
</td></tr></table>

<h1 id="Comparision-of-Execution-Time">5.) Comparision of Execution Time</h1>

<p>The measurement of the t