): Process color difference input DEi for output (helper fnc).</span>

<span class="sd"> :DE_camucs(): Calculate color appearance difference DE using camucs type model.</span>

<span class="sd"> :DE_2000(): Calculate DE2000 color difference.</span>

<span class="sd"> :DE_cspace():  Calculate color difference DE in specific color space.</span>

<span class="sd">.. codeauthor:: Kevin A.G. Smet (ksmet1977 at gmail.com)</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="kn">import</span> <span class