[vtkusers] how to change image order

[Lic. José M. Rodriguez Bacallao]

> If you are lucky, you could do it the other way around, you could do
> as David G. suggested: read each image one by one and use a
> vtkImageAppend. This solution may not work easily if your data has
> Rescale/Slope Intercept...

why I this solution will not work easily if my data has Rescale/Slope
Intercept...? vtkGDCMImageReader apply Rescale/Slope no?


On 12/22/09, Mathieu Malaterre <mathieu.malaterre at gmail.com> wrote:
> On Tue, Dec 22, 2009 at 3:14 PM, Lic. José M. Rodriguez Bacallao
> <jmrbcu at gmail.com> wrote:
>> this:
>>
>>> Should I show a 3D volume over time, or should I show a movie
>>> of a specific 2D slice over time.
>>
>> join to this:
>>
>>> There is no filter to reorganize the vtkImageData
>>
>> are my problem, I need to apply a different image order to a loaded
>> vtkImageData and I don't want to reread the images again with the new
>> order. Do I have to read every slice separately, sort the slices and
>> use vtkImageAppend to form and a vtkImageData again?
>
> As David G. pointed there is no *easy* way of doing that in VTK at the
> moment.
>
> Now if you are a true hacker, there is a backdoor to that. You can
> create a vtkImageData from a vtkDouble/Float/Int.../Array. And in turn
> you can create a vtkDouble/Float/Int.../Array from a memory buffer
> *without* duplicating the memory.
> So within your specific application you could read all your images in
> a single vtkGDCMImageReader, and from the
> vtkGDCMImageReader::GetOutput() retrieve the large vtkImage and then
> do the manual computation of each individual images.
>
> If you are lucky, you could do it the other way around, you could do
> as David G. suggested: read each image one by one and use a
> vtkImageAppend. This solution may not work easily if your data has
> Rescale/Slope Intercept...
>
> Cheers
> --
> Mathieu
>


-- 
Lic. José M. Rodriguez Bacallao
Centro de Biofisica Medica
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