Posted by
Robert Smith on
URL: http://imagej.273.s1.nabble.com/Automatized-object-identification-segmentation-of-fish-from-photos-tp5018968p5018972.html
Radinger ,
Actually it may be much easier to get a video of whatever it is you may want (e.g. AVI) as an image sequence and then us it as a stacked image. Then use the individual images to get the one you want or one (or several) to perform the math required.
I would be difficult to remove one image from another with much work.
Try it. If you need more advice on this technique let me know.
Bob Smith
________________________________
From: Johannes Radinger <
[hidden email]>
Sent: Monday, June 26, 2017 8:23 AM
To:
[hidden email]
Subject: Re: Automatized object-identification / segmentation of fish from photos
FYI, actually, I am not taking the pictures myself, I'll rather use already
taken pictures e.g. as from fishbase.org. So I don't have the possibility
to select my aquarium background or to take to independent pictures (w and
w/o the fish)...
Anyway I'll give ilastik a try and read deeper into DNN, but I guess an
automatized way might be very difficult not to say impossible.
/johannes
On Mon, Jun 26, 2017 at 2:11 PM, Jeremy Adler <
[hidden email]
> wrote:
> Johannes & Herbie,
> Segmentation is clearly very difficult.
>
> But presumably the fish move - it should then be possible to acquire a
> second image without the fish.
> The difference between the two images is - the fish.
>
>
> -----Original Message-----
> From: ImageJ Interest Group [mailto:
[hidden email]] On Behalf Of
> Herbie
> Sent: den 26 juni 2017 14:04
> To:
[hidden email]
> Subject: Re: Automatized object-identification / segmentation of fish from
> photos
>
> Good day Johannes,
>
> you may be lucky with some of your images but as you write:
>
> "[...] however the the background is not uniform which might complicate
> things"
>
> Segmentation will not be satisfying in most cases, with images such as the
> second example image.
>
> Please note that it is very hard and sometimes even impossible to remedie
> problems by image processing and analysis that are due to insufficient
> image acquisition.
>
> Why not isolate every fish in a small aqurium with suitable background?
>
> Regards
>
> Herbie
>
> :::::::::::::::::::::::::::::::::::::::::::::::
> Am 26.06.17 um 12:31 schrieb Johannes Radinger:
> > 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
> >
> > --
> > ImageJ mailing list:
http://imagej.nih.gov/ij/list.html> >
>
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