Function detect_corners_from_response 

pub fn detect_corners_from_response(
    resp: &ResponseMap,
    params: &ChessParams,
) -> Vec<Corner>

Core detector: run NMS + refinement on an existing response map.

Useful if you want to reuse the response map for debugging or tuning. Honors relative vs absolute thresholds, enforces the configurable NMS radius, and rejects isolated responses via min_cluster_size.