[Insight-users] Vector Image reading

[Luis Ibanez]

Hi Raluca,

You can now read images whose pixel type
if Offset<N> where N is dimension 1 to 5.

The basic changed required was in the file

Insight/Code/IO/itkDefaultConvertPixelTraits.h

Which provides the template argument for the
ImageFileReader. We should probably add traits
for reading and writing itkPoint, itkVector
and itkCovariantVector.

So, now you can declare your image and reader as:

typedef itk::Image< itk::Offset<3>, 3 > ImageType;
typedef itk::ImageFileReader< ImageType > ReaderType;

Then instantiate a reader and give it a file name.

The DanielssonDistance example in

       Insight/Examples/Filtering

Is now writing the vector image in a MetaImage file.
You may want to experiment with it for generating
a vector distance image. A suggested input file is
Insight/Examples/Data/FivePoints.png



Please let us know if you find any problems,


  Thanks


    Luis


------------------------------------------
Raluca wrote:
> Hi Luis
> 
> Thank you for your answer it's been very helpful. I've done the necessary
> updates and the writer seems to work very well ... there is actually some
> data in the .raw file.
> Another problem arises when I try to read this file. I've declared a pixel
> type to match the image (Offset<3>) so that no conversion is necessary but I
> get a compiler error in the file itkDefaultConvertPixelTraits.h:
>              "ComponentType is not a member of Offset<3>"
> If I define an image with a primitive PixelType (char, short, long  ... etc)
> there is no error but how can I recover the data in its original form
> (Offset<3>) after the reading ?
> 
> Thank you for your help
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