[vtkusers] vtkImageReslice::SetOutputSpacing

[John Eke]

Hello Guys,

I need to shrink an image. I know vtkImageReslice::SetOutputSpacing can 
enlarge images so I am assuming the same method can shrink images. 
Problem is I am finding it difficult to understand how to manipulate the 
three parameters it accepts so that it resizes my image properly.

Could someone please let me know what the three double parameters 
represent?:

    void vtkImageReslice::SetOutputSpacing (double, double, double)

Thanks