[Insight-users] Fast access to slices of 3D image + problem with BinaryFillholeImageFilter

[Tiago Brizolara da Rosa]

Hi all,

    I would like to know if there is a fast way of manipulating a slice of a 
3D volume. Specifically, I want to apply a filter to individual slices of a 
volume. The only way I know for doing that is by, for each desired 
slice: applying a ExtractImageFilter and then applying the filter I want to use 
to the slice image generated.
    Is there a way for jumping this step (ExtractImageFilter)? For example, if I 
wanted to manipulate the pixels of my desired slices, I should use the 
ImageSliceIteratorWithIndex, so I wouldn´t need the ExtractImageFilter. But what 
I want is to apply a filter to each slice. Is it posible to do this without 
having to generate a new image for each one with ExtractImageFilter?

    Now the problem with BinaryFillholeImageFilter. In fact, the reason for the 
above question comes from a workaround to the problem with this filter.
    I tried to use BinaryFillholeImageFilter in exactly the same way as in the 
example file binary_fill_hole.cxx, but without success. Then I noticed that it 
works fine if my image is two-dimensional (I was trying to use in a 3D image 
read from a DICOM series). It was not supposed to work in a 3D image?
    I am using ITK 3.8.0 in Windows 7 and downloaded the code for the morphology 
filters and samples from the Insight Journal´s article Label object 
representation and manipulation with ITK 
(http://www.insight-journal.org/browse/publication/176).    Well, as a 
workaround, I want to apply BinaryFillholeImageFilter to all the individual 
slices of the volume. I think that generating a 2D image for each one would be 
very painfull. This is the reason for the first question of this e-mail.    


    Thanks in advance,

    Tiago
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