The output distribution formula for stack biters based on mirrored threshol
d decomposition is derived. This formula allows one to compute the cumulati
ve distribution function of the output of a stack filter for a given indepe
ndent and identically distributed (i.i.d.) input noise distribution. Mirror
ed threshold decomposition permits us to analyze the input-output character
istics of the stack filter in the binary domain, The sliding window operati
on of the stack filter is modeled by a deterministic finite automaton. The
output distribution of the filter is obtained by interpreting the automaton
as a Markov chain whose transition probabilities depend on the probabilist
ic description of the binary input signal, An example illustrating the use
of the output distribution formula is provided.