sequence (ie sim
 does not fall below simThr), otherwise t&lt;=T is equal to the last frame in
 which obj was found.  You can test if the object was tracked using:
   success = (size(allRct,1)==size(I,4));

 USAGE
  [allRct, allIc, allSim] = kernelTracker( [I], [prm] )

 INPUTS
  I            - MxNx3xT input video
  [prm]
   .rctS       - [0] rectangle denoting initial object location
   .rctE       - [-1] rectangle denoting final object location
   .dispFlag   - [1] show interactive display
   .scaleSrch  