> <span class="n">out</span> <span class="o">=</span> <span class="s1">&#39;DEi&#39;</span><span class="p">):</span>
<span class="w">    </span><span class="sd">&quot;&quot;&quot;</span>
<span class="sd">    Process color difference input DEi for output (helper function).</span>
<span class="sd">    </span>
<span class="sd">    Args:</span>
<span class="sd">        :DEi: </span>
<span class="sd">            | tuple(J ndarray, ab ndarray).</span>
<span class="sd">        :DEtype:</span>
<span class="sd">    