of rgb2 type would be:</span></div><div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;    <span class="comment">// overall 25 pixels * 3 channels * 2 bits/channel = 150 bits</span></div><div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;    <span class="comment">// c = 18 bytes</span></div><div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;    <span class="comment">// r = 6 bits</span></div><div class="line"><a name="l00165"></