[vtkusers] How to convert scalar type from float to unsigned short

[Jianlong Zhou]

hi, all

How to convert the output of vtkImageNonMaximumSuppression from 
its float type to unsigned short type? I want to use the output of 
vtkImageNonMaximumSuppression as the input of 
vtkVolumeRayCastMapper, but this input needs unsigned short type.

Thank you very much.

Best regards,
Jianlong