Author/Source: E. Mote
<p>Original uploader was <a href="https://en.wikipedia.org/wiki/en:User:Emote" class="extiw" title="w:en:User:Emote">Emote</a> at <a class="external text" href="https://en.wikipedia.org">en.wikipedia</a>
</p>
Later version(s) were uploaded by <a href="https://en.wikipedia.org/wiki/en:User:McLoaf" class="extiw" title="w:en:User:McLoaf">McLoaf</a> at <a class="external text" href="https://en.wikipedia.org">en.wikipedia</a>.
Originally from <a class="external text" href="https://en.wikipedia.org">en.wikipedia</a>; description page is/was <a class="external text" href="https://en.wikipedia.org/w/index.php?title=Image%3AConvolution3.PNG">here</a>.