FILTER_BY_TREE    106 lib/gocr/pixel.c #define FILTER_METHOD FILTER_BY_TREE
FILTER_BY_TREE    256 lib/gocr/pixel.c #if FILTER_METHOD == FILTER_BY_TREE || defined(FILTER_CHECKED)
FILTER_BY_TREE    510 lib/gocr/pixel.c #elif FILTER_METHOD == FILTER_BY_TREE