Automatized object-identification / segmentation of fish from photos

Posted by Johannes Radinger on
URL: http://imagej.273.s1.nabble.com/Automatized-object-identification-segmentation-of-fish-from-photos-tp5018968.html

Hi ImageJ users,

I am very new to ImageJ and not at all familiar with the capabilities of
this tool-set. What I'd actually like to do is to extract a fish from a
photo, i.e. separate the fish from its background. And as I want to do this
for many images I am looking for an automatized way. The images look like:

http://fishbase.org/photos/PicturesSummary.php?ID=4730&what=species
http://fishbase.org/photos/PicturesSummary.php?StartRow=0&ID=4662&what=species&TotRec=5

Is it generally possible to detect the fish as an object and to select it.
I thought about some kind of image segmentation, however the the background
is not uniform which might complicate things. Two things are fixed: 1)
There is always only one fish, so the final result should contain one fish
and one background 2) The fish is always more or less centered within the
image.

Any ideas?

/Johannes

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