Minimum Feret Diameter

[alisona5]

Is there a way to measure Minimum Feret Diameter in ImageJ.   I have seen posts on various sites discussing that it is in the source code, but is commented out.  However, I have not seen any resolution to this issue.  I need to measure the minimal feret diameter :the minimum distance of parallel tangents at opposing borders.  This is the accepted parameter in my field and I cannot use any other measurements.  
Does anyone have a plugin or way to go about measuring this?  
Any help is greatly appreciated.

Thanks!
Alison