export declare function compute_laplacian(src: Int32Array | Float32Array, dst: Int32Array | Float32Array, w: number, Dxx: number, Dyy: number, sx: number, sy: number, ex: number, ey: number): void;
export declare function hessian_min_eigen_value(src: number[], off: number, tr: number, Dxx: number, Dyy: number, Dxy: number, Dyx: number): number;