[vtkusers] VTKImageReslice: slow performance.

[abhishek]

Hello Group, I am having performance issues while extracting SAGGITAL/CORONAL
planes using VTKImageReslice. Each call to VTKImageReslice->GetOutput()
takes 5-7 ms.

The volume used has the following properties:
1. Dimensions: 512x512x297
2. Pixel spacing: 0.4x0.4x0.7
3. Scalar type: Unsigned Int16
4. Number of components: 1 (Monochrome).

System & Build environment:
1. Windows 7, 12GB RAM, i3 processor.
2. Visual studio 2013
2. VTK 7.1.1
3. WPF for UI

Are there any known considerations for making VTKImageReslice fast? 



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