ZeroCrossHistogram  169 magick/segment.c   ZeroCrossHistogram(double *,const double,short *);
ZeroCrossHistogram 1379 magick/segment.c       ZeroCrossHistogram(second_derivative,smoothing_threshold,
ZeroCrossHistogram 1391 magick/segment.c   ZeroCrossHistogram(second_derivative,smoothing_threshold,