[Insight-users] region growing segmentation -- isolatedConnectedImageFilter

[sara al kady]

Thanks for your reply,

But Actually I wanted to know which seeds to pick ?

I mean in the example provided with the ITKuserguide .. it is applied on BrainProtonDensitySlice.png image and it uses the first seed (61,140 ) and the other seed  which is from outside the white matter at ( 63,43 )
but when I changed the points to follow the same rule - connected to first seend and NOT connected to the other - so I picked (110, 160 ) and the other seed also ( 63, 43) with lower intenisty 166 .. it gave completely strange output.

so .. any help will be appreciated.

Thanks a lot.

Date: Fri, 6 Mar 2009 14:00:06 -0500
Subject: Re: [Insight-users] region growing segmentation -- 	isolatedConnectedImageFilter
From: harvey.cline at kitware.com
To: sara_alkady at hotmail.com
CC: insight-users at itk.org

Hi 
 
In the example of segmenting the brain from the scalp. The first seed is placed in the brain and the second seed in the scalp. The program uses a binary search to find the smallest threshold value that automatically separates the brain from the scalp. 



2009/3/6 sara al kady <sara_alkady at hotmail.com>


hello,

We've been trying to use region growing techniques to separate the brain components-we're working on axial slices- but there is something that I don't understand in the IsolatedConnectedImageFilter which is .. Which 2 seeds do I have to pick to separate the components ?

I understand that the first seed should be related to the component I want and the 2nd seed from outside it, but it doesn't work with any seed , I think it has to be a specific seed to make the segmentation work correctly.


if anyone knows how to pick the seed or if I misunderstood something and need to use another filter completely kindly tell me.

Thanks,
Sara Al-Kady



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