[vtkusers] GetOrientation()

Amy Henderson amy.henderson at kitware.com
Tue Aug 17 17:13:16 EDT 2004


Hi Sean,

vtkImageReslice does this already.  It does require applying this filter to 
your image data (or structured points), but it means you don't have to 
extend these data set classes to get the results you're after.

- Amy

At 04:56 PM 8/17/2004, Sean McInerney wrote:
>It might be a nice extension to the vtkImageData or vtkStructuredPoints 
>classes to include an RAS permutation matrix or, at least, to make some 
>provision for axis labeling. This metadata could also be an extension to 
>the VTK image file format(s). This should be easy to add without breaking 
>backwards compatibility (except probably binary) and with minimal memory 
>overhead. It seems like such a basic part of imaging work that it need not 
>be application specific. Seems like a good candidate for a library API ... 
>like VTK. Doing this right within the library would be a real boon.
>
>-Sean
>
>David Gobbi wrote:
>>Hi Pallavi,
>>There is no "orientation" for vtkImageData.  The data is always arranged
>>according to an x,y,z data coordinate grid: column number increases with
>>x, row number increases with y, slice number increases with z.  (Unless
>>spacing is negative, in which case col number decreases with x etc)
>>  - David
>>On Tue, 17 Aug 2004, Pallavi Joshi wrote:
>>
>>>Hi,
>>>Is it possible to get the orientation of a grid or a vtkImageData ?
>>>
>>>-------------------------------------------------------------------
>>>Pallavi Joshi
>>>Graduate Student
>>>Medical Image Processing Lab
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