[Insight-users] how to map grayscale to color

[kdsfinger at gmail.com]

hi, all
After finishing segmentation, I'd like to label each region in color
and display in the widget. Is there any feasible way to map the
grayscale (the label on the original segmented image) to color rgb?
Thank you.
Basically, I am looking for a user defined filter, taking the input
image, do some calculation for each pixel, and produce an output
image.
zl2k