7">NVTT_API</a> Surface&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="namespacenvtt.html#a1781708d38918b6eda9165fb5f9c10c1">nvtt::diff</a> (const Surface &amp;reference, const Surface &amp;img, float scale, TimingContext *tc=0)</td></tr>
<tr class="memdesc:a1781708d38918b6eda9165fb5f9c10c1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Image comparison and error measurement functions. (New in NVTT 2.1) <br /></td></tr>
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