stfeatures

 Interface to spatio-temporal feature detectors.

 Wrapper for stfeatures detectors that first shrinks I and then resizes outputs
 appropriately.  It also applies nonmaximal supression and finds local maxima of detector
 output.  

 INPUTS
   I           - 3D uint (or double) array - input video
   sigma       - spatial scale
   tau         - temporal scale
   periodic    - if 1 uses periodic detector else uses harris detector
   thresh      - [optional] abolute threshold for features strength
   maxn        - [optional] maximum number of featrues (alternative to thresh)
   overlap_r   - [optional] controls amount of overlap between cuboids, range: [0,2)
                 (0 -> no overlap, 2 -> minimal restriction on overlap; 1.7 -> default )
   show        - [optional] figure to use for display (no display if == 0)
   shr_spt     - [optional] spatial shrink factor.  Must be integer>1
   tau_spt     - [optional] temporal shrink factor.  Must be integer>1

 OUTPUTS
   R       - detector strength response at each image location
   subs    - detected features locations    
   vals    - relative feature strengths
   cuboids - the detected cuboids (size depends on sigma/tau)
   V       - location of responses visualization

 EXAMPLE
   load example;
   [R,subs,vals,cuboids,V] = stfeatures( I, 2, 3, 1, 2e-4, [], 1.85, 2, 1, 1 );
   [R,subs,vals,cuboids,V] = stfeatures( I, 2, 3, 0, eps, [], 1.85, 2, 1, 5 );

 See also STFEATURES_HARRIS, STFEATURES_PERIODIC, NONMAXSUPR_WINDOW