&gt; I swear I&#x27;ve seen a similar project like a decade ago, somewhere.<p>Probably &quot;Flo Control&quot;[0]. There was a system to get a silhouette of the cat&#x27;s head to identify whether it was carrying anything.<p>0. <a href="https:&#x2F;&#x2F;web.archive.org&#x2F;web&#x2F;20081014091109&#x2F;http:&#x2F;&#x2F;www.quantumpicture.com&#x2F;Flo_Control&#x2F;flo_control.htm" rel="nofollow">https:&#x2F;&#x2F;web.archive.org&#x2F;web&#x2F;20081014091109&#x2F;http:&#x2F;&#x2F;www.quantu...</a>