Function sep_sys::sep_background

pub unsafe extern "C" fn sep_background(
    image: *const sep_image, 
    bw: c_int, 
    bh: c_int, 
    fw: c_int, 
    fh: c_int, 
    fthresh: f64, 
    bkg: *mut *mut sep_bkg
) -> c_int