[Qgis-user] counting fish

[Michael Treglia]

Not integrated with QGIS, but there is an R package designed to help
process images from Camera traps - possibly it could work for your
situation?
https://cran.r-project.org/web/packages/camtrapR/index.html  (the paper
describing the package can be found here::
https://www.researchgate.net/profile/Alexandre_Courtiol/publication/303794320_camtrapR_An_R_package_for_efficient_camera_trap_data_management/links/5755923e08ae155a87b99294.pdf
)

Looks like this program, Timelapse2, is also available:
http://saul.cpsc.ucalgary.ca/timelapse/

hope this helps - searches for camera trap analysis software, and similar,
might lead you to other tools like this.
Mike

On Mon, Feb 6, 2017 at 1:14 PM, Adam Dershowitz <dersh at alum.mit.edu> wrote:

> Computer vision is not an easy task.  You might look into OpenCV as one
> way to get started:
> http://opencv.org
>
>
> --Adam
>
>
>
> On Feb 6, 2017, at 12:13 PM, Jake Maier <j.m at jmforestry.com> wrote:
>
> <image001.gif>
> 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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