[Insight-users] Using itkDiscreteGaussianImageFilter while wr iting multiple outputs

[Miller, James V (Research)]

What version of ITK are you using? 1.4, 1.6, CVS?

There was a bug in the MetaIO that did not allow writer to be re-used for a
different file.  I think that has been fixed.

You might try instantiating a new writer for each file every time you call
SetVariance on the gaussian, connect the gaussian to a new writer.

Jim

-----Original Message-----
From: Robert Maroon [mailto:robertmaroon@yahoo.com]
Sent: Friday, May 07, 2004 12:04 PM
To: ITK
Subject: [Insight-users] Using itkDiscreteGaussianImageFilter while
writing multiple outputs


Hi all,

I am having a problem using the
itkDiscreteGaussianImageFilter in a progam where I am
inputting a volume using a metaheader, and then using
a while loop to:

1) Apply a Gaussian of sigma_i to the volume.
2) Write it to a file where I add i to the end        
 of the file name (before the extension).
3) Change the sigma to sigma_i+1 using
gaussianFilter->SetVariance(newSigma)
4) Repeat.

The problem is that while the raw files are being
written out, they all have only the first sigma
applied to them. Is there a way to update a filter in
the middle of a program like I describe and make it
update it's parameters? Thus applying the updated
sigma to each new volume?

Also, when I write out the files, I get all the
numbered .raw files but I only get one metaheader file
pertaining to the last one written out. Is there
anyway of making it write multiple metaheader files? 

For the metaheader files I am using:
itk::MetaImageIO for the image types, and I do a 

writer->SetImageIO( metaWriter );

after I set the input of the writer.

Thanks!



	
		
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