105945.fig.0016a
(a) Original image
105945.fig.0016b
(b) Edges detected by HVD with LPF
105945.fig.0016c
(c) Scaling factor
105945.fig.0016d
(d) Scaling factor
Figure 16: for HVD. (a) The image “Goldhill” (720 × 576 grey image). (b) Edges detected by HVD with LPF. (c and d) Sharpened results by HVD with scaling factors and , respectively.