<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">Computer vision is not an easy task. You might look into OpenCV as one way to get started:<br class=""><div class=""></div></div><a href="http://opencv.org" class="">http://opencv.org</a><br class=""><div class="">
<div class=""><br class="khtml-block-placeholder"></div><div class=""><br class=""></div><div class="">--Adam</div><div class=""><br class="khtml-block-placeholder"></div><div class=""><br class="khtml-block-placeholder"></div>
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<br class=""><div><blockquote type="cite" class=""><div class="">On Feb 6, 2017, at 12:13 PM, Jake Maier <j.m@jmforestry.com> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta name="Microsoft Theme 2.00" content="Arctic 011" class=""><meta http-equiv="Content-Type" content="text/html; charset=us-ascii" class=""><meta name="Generator" content="Microsoft Word 15 (filtered medium)" class=""><style class=""><!--
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</v:background></xml><![endif]--><div class="WordSection1"><div 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 class=""></o:p></div><div class="MsoNormal"><o:p class=""> </o:p></div><div 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 class=""><br class=""><o:p class=""></o:p></div><div 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 class=""></o:p></div><div class="MsoNormal"><o:p class=""> </o:p></div><div class="MsoNormal">Is there a fairly easy way to do this?<o:p class=""></o:p></div><div class="MsoNormal"><o:p class=""> </o:p></div><div class="MsoNormal">Thanks for any help.<o:p class=""></o:p></div><div class="MsoNormal"><o:p class=""> </o:p></div><div class="MsoNormal">Jake<o:p class=""></o:p></div></div></div>_______________________________________________<br class="">Qgis-user mailing list<br class="">Qgis-user@lists.osgeo.org<br class="">List info: https://lists.osgeo.org/mailman/listinfo/qgis-user<br class="">Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user</div></blockquote></div><br class=""></body></html>