[Qgis-user] counting fish

[Jake Maier]

Is there an easy way, even an existing plugin, to identify photos which show
an object (fish)  swimming over a white board.

 

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. 



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. 

 

Is there a fairly easy way to do this?

 

Thanks for any help.

 

Jake

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