[Insight-users] Reading vector images from multiple files

[Christoph Palm]

Hi Jonathan,

perhaps you better use the ImageSeriesReader, so you are flexible
with the number of image to be read. The number of image will be
generated at run time by solving a regular expression according to
your file names.
Then, the cascading of join image filters can be done within a loop.
But remember to create in each loop iteration a new join image filter!

A more elegant way would be to write your own filter for doing this,
but my first approach will be faster to implement, I think.

Regards

	Christoph

Am Don, den 26.08.2004 schrieb Jonathan Lok-Chuen Lo um 13:28:
> Hi Christoph,
> 
> Thanks once again for your reply.
> 
> I have implemented as you mentioned and it works.  Because I need to read in
> 6 images, I have cascaded 5 JoinImageFilter together.  However, this does
> not allow me to change the number of images at run-time (I am looking at the
> temporal MRI images for contrast-agent uptake study, and the number of
> images per time sequence can vary between 5 to 7 images).
> 
> Are there any other ways to achieve this?  I know there is a
> Compose3DVectorImageFilter for the 3D case, but are there one for
> N-dimensional case?  (I did have a look at NaryFunctorImageFilter, but don't
> know how to implement for composing N images.)
> 
> Thank you in advance.
> 
> With regards,
> Jonathan
> 
> -----Original Message-----
> From: Christoph Palm [mailto:christoph.palm at web.de] 
> Sent: 25 August 2004 13:15
> To: Jonathan Lok-Chuen Lo
> Cc: ITK User Mailing List
> Subject: Re: [Insight-users] Reading vector images from multiple files
> 
> 
> Hi Jonathan,
> 
> I would read the image files as usual with the ImageFileReader or
> ImageSeriesFileReader for Imagetype: itk::Image<unsigned char, 2>. After
> that use the JoinImageFilter with your VectorImageType as 
> OutputImageType to join the images into a vector.
> 
> Regards
> 
> Christoph
> 
> Am Mit, den 25.08.2004 schrieb Jonathan Lok-Chuen Lo um 14:03:
> > Hi All,
> > 
> > I am trying the following, and any help would be very much 
> > appreciated.  I would like to reading a vector image, but the 
> > components are stored in multiple files:
> > 
> > // Input vector pixel
> > const unsigned int vectorDimension = 6;
> > typedef itk::Vector< unsigned char, vectorDimension > InputPixelType;
> > 
> > // Input image type
> > const unsigned int imageDimension = 2;
> > typedef itk::Image< InputPixelType, imageDimension > InputImageType;
> > 
> > And I have got 6 different images file, where each file contain one 
> > component values for the whole image.
> > 
> > I am wondering what would be the best way to handle this.
> > 
> > Thank you!
> > 
> > With regards,
> > Jonathan Lo
> > 
> > *************************************
> > Jonathan Lok-Chuen Lo
> > 
> > Medical Vision Labortory
> > Department of Engineering Science
> > Oxford University
> > Parks Road
> > Oxford OX1 3PJ
> >  
> > Phone: (44) 1865 280940
> > Fax:   (44) 1865 280922
> > *************************************
> > 
> > 
> > _______________________________________________
> > Insight-users mailing list
> > Insight-users at itk.org 
> > http://www.itk.org/mailman/listinfo/insight-users
-- 
-------------------------------------
Dr. Christoph Palm
Dipl.-Inform.

Research Center Juelich
Institute of Medicine
D-52428 Juelich

Phone: +49-2461 / 61 4774
Email: ch.palm at fz-juelich.de
Web:   www.chripa.de/AtWork
-------------------------------------