Function leptonica_sys::pixContrastNorm

pub unsafe extern "C" fn pixContrastNorm(
    pixd: *mut PIX,
    pixs: *mut PIX,
    sx: l_int32,
    sy: l_int32,
    mindiff: l_int32,
    smoothx: l_int32,
    smoothy: l_int32
) -> *mut PIX