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</v:background></xml><![endif]--><div class=WordSection1><p class=MsoNormal>Is there an easy way, even an existing plugin, to identify photos which show an object (fish) swimming over a white board.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I live on a river and there is a potential problem with alewives, an extremely important fish in the food chain. I’d like to find a way with a wildlife camera to take a photo at regular intervals over 3 week. The more photos I can handle (possibly thousands) the more accurate my count. <br><br><o:p></o:p></p><p class=MsoNormal>I was hoping to find an automated way to identify those photos which show an object on the whitish background. I thought it should be possible to just look at the average gray value of the photo. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Is there a fairly easy way to do this?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks for any help.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Jake<o:p></o:p></p></div></body></html>