pub fn spatial_gradient_u8(
input: ImageView<'_, u8, 1>,
border: BorderMode<u8, 1>,
) -> VisionResult<(Image<i16, 1>, Image<i16, 1>)>Expand description
Computes exact 3×3 Sobel X/Y gradients together for grayscale u8 input.
This matches OpenCV spatialGradient: outputs are signed i16, the two
first derivatives share one source traversal, and only replicated or
Reflect101 borders are accepted. CPU storage remains caller-owned and no
device transfer is performed.