7"></a><span class="lineno">   37</span>&#160;    attributes.push_back(<span class="stringliteral">&quot;filter:brightness:mean&quot;</span>);</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;    attributes.push_back(<span class="stringliteral">&quot;filter:brightness:standard-deviation&quot;</span>);</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;    attributes.push_back(<span class="stringliteral">&quot;filter:brightness:kurtosis&quot;<