[Insight-users] Filter Vs. Function

[Brady McCary]

Insight-users,

I am writing some level set image filters and I am trying to
understand the differences between ImageFilters and Functions. For
example:

BinaryThresholdImageFilter
BinaryThresholdImageFunction

or

GeodesicActiveContourLevelSetFunction
GeodesicActiveContourLevelSetImageFilter

Would someone please discuss this class separation (preferably the
reasoning behind it followed by an example)?

Brady