pub unsafe extern "C" fn pixFindColorRegions(
    pixs: *mut PIX,
    pixm: *mut PIX,
    factor: l_int32,
    lightthresh: l_int32,
    darkthresh: l_int32,
    mindiff: l_int32,
    colordiff: l_int32,
    edgefract: l_float32,
    pcolorfract: *mut l_float32,
    pcolormask1: *mut *mut PIX,
    pcolormask2: *mut *mut PIX,
    pixadb: *mut PIXA
) -> l_ok