Research Article

An Efficient and Self-Adapted Approach to the Sharpening of Color Images

Figure 12

for HVD. (a) The image “Foster City, CA” (512 × 512 color image). (b) Edges detected by HVD with LPF. (c and d) Sharpened results by HVD with scaling factors and , respectively.
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(a) Original image
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(b) Edges detected by HVD with LPF 
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(c) Scaling factor
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(d) Scaling factor