Function sobel_abs_3x3_u8_into 

pub fn sobel_abs_3x3_u8_into(
    input: ImageView<'_, u8, 1>,
    dx: usize,
    dy: usize,
    border: BorderMode<u8, 1>,
    output: &mut [u8],
) -> VisionResult<()>

Computes an exact absolute first-order 3x3 Sobel response into packed output.