[Insight-users] Filter plans

Prename Surname bsd.diverse at gmail.com
Thu Oct 19 04:55:41 EDT 2006 

That looks great Robert
I will look into it later today and let you know what i think.

Regards


2006/10/19, Robert Tamburo <robert.tamburo at gmail.com>:
>
>  Hi,
>
>
> I started to write up an email describing the filter, but decided that I
> should just go ahead and write up an article and submit it to the Insight
> Journal. I also submitted the filter code and example code for using the
> filter.
>
>
> The URL to the filter article is :
> http://insight-journal.org/dspace/handle/1926/323
>
>
> Let me know if you have any questions or problems.
>
>
> -Robert
>
>  On Oct 18, 2006, at 1:30 AM, Prename Surname wrote:
>
>  Hey Robert
> That sounds really interresting. What approach are you using in your
> filter? I would very much like to hear more.
>
> Best of regards
>
>
> 2006/10/18, Robert Tamburo <robert.tamburo at gmail.com>:
> >
> >  Hi guys,
> >
> >
> > I'm actually working on a similar filter and should have it finished in
> > a couple of days (depending on how my cold progresses). Basically the image
> > takes as input a vector of input images and produces a single image with the
> > "interesting" voxels from the input images labeled. I can post the filter
> > when finished.
> >
> >
> > -Robert
> >
> >  On Oct 17, 2006, at 6:15 PM, Prename Surname wrote:
> >
> >  Aha, that would of course also be an idea to do like that. I dont know
> > any of these filters.
> > So your interresting suggestion is to subclass the
> > itk::NaryFunctorImageFilter< TInputImage, TOutputImage, TFunction >
> > so that it accepts 3 input images in the constructor, and then
> > internally does what?
> >
> >
> > 2006/10/17, Gaëtan Lehmann <gaetan.lehmann at jouy.inra.fr>:
> > >
> > > Le Tue, 17 Oct 2006 21:18:16 +0200, Prename Surname
> > > < bsd.diverse at gmail.com > a écrit:
> > >
> > > > aha i see...
> > > > Yes, of course i know this is simple, but starting simple is always
> > > the
> > > > way
> > > > to go :)
> > >
> > > sure
> > >
> > > >
> > > > I think maybe you have misunderstood what i want to do. I dont want
> > > to
> > > > make
> > > > a RGB image, i just want to combine 3 different binary mask images
> > > into a
> > > > single grayscale mask image with values 0,1,2,3 (0=background, 1=gm,
> > > > 2=wm,3=wm)
> > > > If i just manage this i can port it to vtk no problem.
> > > > So i just wanted to create a composite filter to do this for me.
> > > > Do you see what i mean?
> > >
> > > Yes, I think :-)
> > > This mean you are sure that the object in an image is never
> > > overlapping
> > > with the objects in the other images. Is it the case ?
> > > If yes, you can use ChangeLabelImageFilter to change the value of your
> > > background pixels to 0 (if it's not already the case), and the values
> > > of
> > > the foreground pixel to 1 in the first image, 2 in the second one, and
> > > 3
> > > in the last one. Finally, you can add your 3 images with
> > > NaryAddImageFilter to produce the image you want.
> > > It can be quite boring to instantiate 4 filters to do that - perhaps
> > > that's the right time to implement a custom filter based on
> > > NaryFunctorImageFilter :-)
> > >
> > > Gaetan
> > >
> > > >
> > > > Many regards :)
> > > >
> > > >
> > > > 2006/10/17, Gaëtan Lehmann < gaetan.lehmann at jouy.inra.fr>:
> > > >>
> > > >>
> > > >> Hi,
> > > >>
> > > >> Most of the time, the simple manipulation like this one can already
> > > be
> > > >> done in ITK or VTK, so you shouldn't have to create a new filter to
> > > do
> > > >> that :-)
> > > >> However, we are always pleased to see someone motivated to develop
> > > some
> > > >> new features for the toolkit, especially if he/she want to
> > > contribute
> > > >> that
> > > >> code to the community. I'm pretty sure you'll find something useful
> > > to
> > > >> code soon :-)
> > > >>
> > > >> To combine your 3 images, you can use ComposeRGBImageFilter (1),
> > > which
> > > >> takes 3 input images and give you a RGB image.
> > > >> However, I'm not sure you can pass the rgb image directly to vtk
> > > >> (perhaps
> > > >> something to code :-)). You'll have to pass the 3 binary images in
> > > vtk
> > > >> with ImageToVTKImageFilter, and compose the color image in vtk.
> > > >>
> > > >> Gaetan
> > > >>
> > > >> (1)
> > > >> http://www.itk.org/Doxygen/html/classitk_1_1ComposeRGBImageFilter.html
> > >
> > > >>
> > > >>
> > > >>
> > > >> Le Tue, 17 Oct 2006 19:56:04 +0200, Prename Surname
> > > >> < bsd.diverse at gmail.com> a écrit:
> > > >>
> > > >> > Hello.
> > > >> > I am beginning to feel a bit more at home in itk/vtk now. There
> > > are
> > > >> > still a
> > > >> > zillion things to learn about it, but its getting a bit better.
> > > So
> > > >> now i
> > > >> > have decided that i want to try and make my own filter to get
> > > more
> > > >> > acquainted with the whole pipeline approach.
> > > >> >
> > > >> > I have read chapter 13 in the itksoftwareguide, and i have
> > > thought
> > > >> about
> > > >> > a
> > > >> > approach to make my filter. I was hoping some of you experts
> > > would
> > > >> tell
> > > >> > me
> > > >> > if i am completely off, or if my idea is okay.
> > > >> > My situation is this:
> > > >> > I have a greyscale volume consisting of 182 slices that are
> > > 182x218
> > > >> > pixels
> > > >> > of a brain.
> > > >> > I have a mask of corresponding size with values 0 and 255 for the
> > >
> > > >> > positions
> > > >> > of greymatter
> > > >> > I have a mask of corresponding size with values 0 and 255 for the
> > >
> > > >> > positions
> > > >> > of whitematter
> > > >> > I have a mask of corresponding size with values 0 and 255 for the
> > >
> > > >> > positions
> > > >> > of CSF(brainfluid)
> > > >> >
> > > >> > Basically i want my filter to combine the 3 masks to a single
> > > image,
> > > >> so
> > > >> > that
> > > >> > i can visualize this image in vtk with different colors for
> > > >> greymatter,
> > > >> > whitematter and CSF.
> > > >> >
> > > >> >
> > > >> > Making a filter (lets call it masking)that subclasses
> > > >> ImageToImageFilter,
> > > >> > and then takes 2 input images and somehow combining them to a
> > > single
> > > >> > image
> > > >> > by just adding them together.
> > > >> >
> > > >> > I then want to make a compositefilter that actually makes a
> > > pipeline
> > > >> of
> > > >> 2
> > > >> > masking filters, taking first 2 masks, combining them in the
> > > masking
> > > >> > filter,
> > > >> > takes the output of this and combine it with the third mask using
> > > >> again
> > > >> > the
> > > >> > masking filter, and then outputting the final masked image.
> > > >> >
> > > >> > Does this sound  feasible, and more important is this a good
> > > approach?
> > > >> > I hope for some feedback.
> > > >> >
> > > >> > Many regards and thank you
> > > >>
> > > >>
> > > >>
> > > >> --
> > > >> Gaëtan Lehmann
> > > >> Biologie du Développement et de la Reproduction
> > > >> INRA de Jouy-en-Josas (France)
> > > >> tel: +33 1 34 65 29 66    fax: 01 34 65 29 09
> > > >> http://voxel.jouy.inra.fr
> > > >>
> > >
> > >
> > >
> > > --
> > > Gaëtan Lehmann
> > > Biologie du Développement et de la Reproduction
> > > INRA de Jouy-en-Josas (France)
> > > tel: +33 1 34 65 29 66    fax: 01 34 65 29 09
> > > http://voxel.jouy.inra.fr
> > >
> >
> > _______________________________________________
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> > Insight-users at itk.org
> > http://www.itk.org/mailman/listinfo/insight-users
> >
> >
> >
> >
>
>
>
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