DeltaTau         1731 magick/segment.c   (void) OptimalTau(histogram[Red],Tau,0.2,DeltaTau,smoothing_threshold,
DeltaTau         1733 magick/segment.c   (void) OptimalTau(histogram[Green],Tau,0.2,DeltaTau,smoothing_threshold,
DeltaTau         1735 magick/segment.c   (void) OptimalTau(histogram[Blue],Tau,0.2,DeltaTau,smoothing_threshold,