Function find_corners_u8 

pub fn find_corners_u8(
    img: &[u8],
    w: usize,
    h: usize,
    params: &ChessParams,
) -> Vec<CornerDescriptor>

Compute corners starting from an 8-bit grayscale image.

This is a convenience that combines:

• chess_response_u8 (dense response map)
• thresholding + NMS
• subpixel refinement driven by ChessParams::refiner

Panics

Panics if img.len() != w * h.