Function leptonica_sys::pixConvertRGBToBinaryArb

pub unsafe extern "C" fn pixConvertRGBToBinaryArb(
    pixs: *mut PIX, 
    rc: l_float32, 
    gc: l_float32, 
    bc: l_float32, 
    thresh: l_int32, 
    relation: l_int32
) -> *mut PIX