The authors introduce a new bit-serial algorithm for stack filtering,
designated as the bit-serial window partitioning algorithm. It is show
n that the proposed algorithm can achieve very important savings over
the conventional bit-serial binary-tree search algorithm, in terms of
the computational speed. This improved efficiency is obtained by evalu
ating the Boolean function at thresholds corresponding to the sample v
alues within the filter window, and by taking advantage of the orderin
g information associated with the threshold sequences.