[Insight-developers] Help with new IO class

[Luis Ibanez]

Hi Richard,

Just to clarify...


A)  In your new ITK reader, when you force the
     image dimensions to be

   - 256 in X
   - 512 in Y
   - 256 in Z

Then the image is read correctly ?

and

B)  if you set the image dimensions as

   - 512 in X
   - 256 in Y
   - 256 in Z

then you observe an interleave effect ?


and

C) your in-house reader works fine by assuming that
    the fastest changing direction (X) has 512 pixels ?


Please let us know if (A), (B), and (C) are correct or not.

---

Could you try writing a meta image header for the raster file ?

>From the parameters of the MetaImage header it will be easy
to figure out what is the correct configuration of the image.

Note that you can use the application

   InsightApplications/MetaImageImporter

as a helper for creating the MetaImage header.



   Please let us know what you find,


        Thanks

            Luis


---------------------------------------------------------------------------------------
On 4/3/07, Richard Beare <richard.beare at gmail.com> wrote:
>
> Hi everyone,
>
> I'm writing an IO class to read Bruker MR images. A basic form is
> working, but I'm having trouble with order of dimensions.
>
> Bruker has a text file that include dimension and other information.
> In my test file the dimensions are list as 512 x 256 x 256. The image
> data is stored in a single file in raster order.
>
> A non itk reader I have access to simply reads the data assuming that
> the fastest changing dimension (x) is 512 elements long, the next
> fastest (y) is 256 etc.
>
> I attempted to do the same, by using the  SetDimensions method in the
> IO class. However this lead to results having classic signs of mixed
> up dimension sizes (strange interleaving effects).
>
> If I hard code the dimensions to be 256 x 512 x 256, then things look OK.
>
> Is there an orientation setting that should control this? I'd like to
> avoid hard coding a reordering if possible. I was wondering what the
> correct approach would be....
>
> Thanks
> _______________________________________________
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> Insight-developers at itk.org
> http://www.itk.org/mailman/listinfo/insight-developers
>
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