   .dispFlag   - [1] show interactive display
   .scaleSrch  - [1] if true search over scale
   .nBit       - [4] n=2^nBit, color histograms are [n x n x n]
   .simThr     - [.7] sim thr for when obj is considered lost
   .scaleDel   - [.9] multiplicative diff between consecutive scales

 OUTPUTS
  allRct       - [t x 4] array of t locations [x,y,wd,ht]
  allSim       - [1 x t] array of similarity measures during tracking
  allIc        - [1 x t] cell array of cropped windows containing obj

 EXA