pub unsafe extern "C" fn pixBackgroundNormRGBArrays(
    pixs: *mut PIX,
    pixim: *mut PIX,
    pixg: *mut PIX,
    sx: l_int32,
    sy: l_int32,
    thresh: l_int32,
    mincount: l_int32,
    bgval: l_int32,
    smoothx: l_int32,
    smoothy: l_int32,
    ppixr: *mut *mut PIX,
    ppixg: *mut *mut PIX,
    ppixb: *mut *mut PIX
) -> l_ok