Function vlfeat_sys::vl_imgradient_f

pub unsafe extern "C" fn vl_imgradient_f(
    xGradient: *mut f32, 
    yGradient: *mut f32, 
    gradWidthStride: vl_size, 
    gradHeightStride: vl_size, 
    image: *const f32, 
    imageWidth: vl_size, 
    imageHeight: vl_size, 
    imageStride: vl_size
)