The old version was hardcoded for noise images that were
two component and floating point. The new version should
handle 1-4 components (it will use the first) and it should
warn if the noise input is not float. If no noise inpt was
provided this class was creatnig one by default, but it was
VTK_DOUBLE not float. Added an ImageCast to float to make
it work like it should when using a default noise.