105945.fig.009a
(a) Original image
105945.fig.009b
(b) Edges detected by HVD with LPF
105945.fig.009c
(c) Scaling factor
105945.fig.009d
(d) Scaling factor
Figure 9: for HVD. (a) The image “Lena” (512 × 512 color image). (b) Edges detected by HVD with LPF. (c and d) Sharpened results by HVD with scaling factors and , respectively.