What parameters are used in PCL's Bilateral Filter?

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I was trying to find out the parameters which are used as standard in PCL's bilateral filtering routine for Kinect images.

As I understand it, the required parameters for bilateral filtering are:

• Spatial Gaussian width
• Gaussian width in the range dimension
• Width in pixels over which the filter operates

Are these parameters hard coded into the Bilateral filtering routine? If so, where can I find them? If not, what parameters are typically used with Kinect images?