[Insight-users] MetaIO doc?

[Karthik Krishnan]

Kris Thielemans wrote:

>Hi
>
>I can't find a good documentation about the MetaIO fileformat. It is mostly
>straightforward, but I'd like to know what the header has to be and some
>other stuff. 
>
>  
>
http://www.vtk.org/Wiki/ITK_File_Formats
http://caddlab.rad.unc.edu/software/MetaIO/MetaIO-Introduction.htm

>My most urgent question is what order the data is written in when writing
>deformations after registration:
>
> typedef itk::Vector< float, ImageDimension >  VectorType;
> typedef itk::Image< VectorType, ImageDimension >  DeformationFieldType;
> typedef itk::ImageFileWriter< DeformationFieldType >  FieldWriterType;
>
>  
>
If you have an image with 2 pixels in it
itkVector< float, 3 > p1
itkVector< float, 3 > p2

The raw part of the meta image file will be

p1(0) p1(1) p1(2) p2(0) p2(1) p2(2)

for default settings...

-------------
the order in which things are written is dictated by the 
itk::DefaultConvertPixelTraits class. If you want to read with your own 
order say

p1(1) p1(0) p1(2) p2(1) p2(0) p2(2),

write your ConvertPixelTraits class....

regards
karthik


>Many thanks
>
>Kris Thielemans
>Hammersmith Imanet, part of GE Healthcare
>London W12 ONN, United Kingdom
>
>
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>  
>