[Insight-users] Filter plans

[Gaëtan Lehmann]

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