[Insight-users] image intensity resclaing

[salah]

Hello all,

I need to do some kind of rescaling the intensities of an
image in such a way like the so-called "histogram windowing".
In other way,  I want to rescale the intensities that lie in=20
a range (a, b) so that they fit in the whole intesity range=20
(say 0, 255), all values less than a are set to zero and all
those greater that b are set to 255.

Is there an already-made filter in itk that does this??

Thanks,
Zein