tcodes : the internal nodes of a tree indexing by breadth first.
Each node contains a feature to check.
A feature is a two-pixel pair coordination to compare the pixel intensity.
              0                     0
      1              2              1
   3    4         5     6           2
 7  8  9 10    11  12 13 14         3
the left descendent of node i is (2*i + 1)
the right descendent of node i is (2*i + 2)

bintest:
An object bounding box centering at (r,c,s) is virtually
normalized to 1.0 x 1.0 or 256x256
p[0],p[1],p[2],p[3] are x,y coordination randomly genereated and normalized
to -128-127, so the full range is 256.
Transform [-128, 127] to [-0.5,0.5] ==> p[n]/256 -> [-0.5,0.5]
The real pixel coordinate in the rid is
box center (r,c) + offset transformed:  <r,c> + <(p/256)*sr, (p/256)*sc>,
where sc and sr is the diameter of the face bounding box.
since tsr and tsc are 1.0 only, sr,sc are equal to
diameter of the boundong box.