105945.fig.0011a
(a) Original image
105945.fig.0011b
(b) Edges detected by HVD with LPF 
105945.fig.0011c
(c) Scaling factor
105945.fig.0011d
(d) Scaling factor
Figure 11: for HVD. (a) The image “Baboon” (512 × 512 color image). (b) Edges detected by HVD with LPF. (c and d) Sharpened results by HVD with scaling factors and , respectively.